5.0 out of 5 stars High quality, great value

2026-02-23    -Super Heavy

An extremely high quality mouse at a good price. I also own the Kensington Orbit, but the larger, heavier ball on the Expert makes for a much better experience. You can easily flick the cursor across the screen without having the ball move in its housing. The scroll ring is great and maybe a little better than the Orbit's and the additional buttons are a nice quality of life upgrade. Kensington seems to have deprecated the software they used to use for this device, but it works fine natively. I could not get the KensingtonWorks software to run on Windows.

5.0 out of 5 stars High quality, great value

2026-03-04    -Super Heavy

An extremely high quality mouse at a good price. I also own the Kensington Orbit, but the larger, heavier ball on the Expert makes for a much better experience. You can easily flick the cursor across the screen without having the ball move in its housing. The scroll ring is great and maybe a little better than the Orbit's and the additional buttons are a nice quality of life upgrade. Kensington seems to have deprecated the software they used to use for this device, but it works fine natively. I could not get the KensingtonWorks software to run on Windows.

5.0 out of 5 stars This trackball still reigns supreme.

2026-02-12    -Dave

I have written a complete review of this device in its Wireless Version which is no longer manufactured. Its overall design has been well described in these numerous reviews. I would like to address a few of the complaints registered in some of the reviews on this thread, at least IMHO:1) The bearings on which the ball rests are different, and overall, there is no significant change in build quality which is more than adequate.2) Initially I also had some difficulty on Win7/64 with Trackball Works 1.04 and 1.01, the European version which tech support recommends when you call in to complain about the former. In my case, this represented some sort of software conflict which was no longer the case when I gave it another try after having had to reformat and reinstall my system for other reasons. Initially, although I could program the trackball without difficulty, it would intermittently hang, or my computer would crash. Since the reinstall, now for about 3 months use, Version 1.04 works absolutely fine with this Expert Mouse, but install the software before connecting the device, as mentioned. Absolutely NONE of the initial problems have recurred. Trackball Works has some problems with complete programming of the Slimblade Trackball version and Kensington is working on it, with a supposed upgrade to the software due in March, at least at the time of this writing.3) The ergonomic issues raised by some of the reviewers are legitimate, but it depends a great deal on the individual user. I agree that the "wrist rest" supplied is not a very successful solution. Some will prefer the flatter format of the Slimblade, but I don't think the four buttons work as smoothly as those on the Expert, and are very dependent on where you place your fingers on them, which is not the case with the latter which are nicely designed. At work, I use this trackball for hours on end, now for years, in our radiology department, scrolling through images, and have had absolutely no wrist or finger pain. One of the tricks is to operate the mouse with your hand canted to the right at about a 30 degree angle which helps to obviate more extreme wrist extension. Give your hand and wrist a brief rest by changing position every few minutes which can easily be done automatically during the workflow since you aren't gripping something. Any pointing device without rest will be a nuisance. For those who are particularly sensitive, place a small bean bag place under the palm of the hand, not the wrist. Since you aren't spatially moving the unit, it is not intrusive, if you buy a proper sized bag.4) Complaints about the scroll ring, IMHO, are entirely unjustified. It works very well. I have had no problems with its function on this unit, my previous wireless mouse, or any in our Department at work.5) Complaints about the ball's being sticky and insensitive are also groundless, IMHO. You will find slight "newness", reflected in slight stiffness,when you first use the unit. This will clear promptly, and even more quickly if you just spin the ball for a couple of minutes with moderate downward pressure to break in the interface between the support pins and the ball. Periodically clean the ball with a little soap and water, then alcohol to restore a smooth surface, and repeat the conditioning routine, in an abbreviated form. At the same time, inspect the pins on which the ball rests for accummulated dust and debris, and make sure they're absolutely clean. Works like a charm.For those that don't like the scroll wheel, try the Slimblade where scrolling is done via the ball itself, turned transversely. That works well....it's just a matter of personal preference. I personally prefer the larger ball on the Expert versus the Slimblade, and the independent scroll wheel. The interface cable on the Slimblade is a little more robust and less prone to kinking if you move the trackball around quite a bit, for example, if you're also using a graphics tablet on which you seat the trackball. In any case, I don't think it's an issue, particularly if you take a bit a care of how you set the mouse down so that it isn't repetitively stressed with a kink. BTW, I couldn't find the magnet that one reviewer talked about at the bottom of the receiver for the ball. All that's there is the optical pickup. BTW, if you use the Intuous 4 Wacom tablet, the RF mouse they supply is greatly improved over previously, and is nicely programmable, except for no control over acceleration which some users may find a distinct negative.Bottom line: HIGHLY recommended after years of experience using this trackball. Works perfectly well with Win 7/64.

Good size trackball; very easy use with either hand

2026-01-23    -AMM

Great trackball. Easy to connect; just plug the dongle in, and it's good to go. Really good size of trackball allows me to use three fingers to navigate precisely with my non-dominant hand. Comfortable to use from the couch too. The buttons click nicely and the scroll wheel works well. It's definitely a little bit pricey, but definitely worth it to be able to rest my injured dominant hand but still be able to enjoy good precision when using my home PC. The ball comes out easily to clean, so I wouldn't want to take this loose in my bag into the office, but that isn't really a consideration for me since I've switched this one out for the Orbit Fusion, which I'll take to work instead.

5.0 out of 5 stars best of two mice I will always rebuy

2026-02-11    -ghanzho

absolutely they best mouse for executives, presenters, writers, artists and RTS gamers. I use this side by side with my other trackball for every other gaming and activities. lasts and lasts, is easy to clean. mind cable wear tho. this was the first time I've ever had a mouse catch fire. no fault of design. it got pinched and shorted. however the old one's electronics saved both the PC port and its own board. I had enough parts left over to combine with an old one and make a spare. 10/10 I will always leave a good review when repair-ability and durability meets functionality and class. love the flow of the trackball and how I can swirl it where I want it putting my finger back on it when it reaches its destination. with five screens it is a must.

Perfecto para trabajos de precisión

2026-01-04    -apgimenez

Desde que lo uso ya no se me cansa la muñeca, a pesar de que lo utilizo unas seis horas al día. He ganado en productividad porque, gracias a su gran bola, puedo situar el cursor exactamente donde quiero a gran velocidad. Los cuatro pulsadores de que dispone son grandes, sensibles y cómodos para usar. Aunque puede configurarse para que la pulsación conjunta de dos botones adyacentes sea equivalente a otro botón, esto no me resulta práctico porque es difícil hacer la pulsación simultánea.

Great product!

2026-02-08    -Cooper J.

I just got this trackball, first time using a trackball ever, i was delighted by how well this one works. the included wrist rest is really helpful especially for my hnda when on a hard surface, the ball rolls smoothly and with precision, the only slight thing is the scroll ring has a slight wobble to it, but it is not that bad, i am just very particular. but i do really like the scroll ring, i am able to operate the left click with my thumb and right click with my little finger. very easy to use and the optional kensingtonworks software is great, its not needed to use the trackball, but you can set so many options for the 2 programable buttons, the top 2 buttons are great, but you have to be very very precise about clicking both at once when using shortcuts, overall this was an amazing purchase, and i am impressed by the quality of kensington products

5.0 out of 5 stars best of two mice I will always rebuy

2026-01-29    -ghanzho

absolutely they best mouse for executives, presenters, writers, artists and RTS gamers. I use this side by side with my other trackball for every other gaming and activities. lasts and lasts, is easy to clean. mind cable wear tho. this was the first time I've ever had a mouse catch fire. no fault of design. it got pinched and shorted. however the old one's electronics saved both the PC port and its own board. I had enough parts left over to combine with an old one and make a spare. 10/10 I will always leave a good review when repair-ability and durability meets functionality and class. love the flow of the trackball and how I can swirl it where I want it putting my finger back on it when it reaches its destination. with five screens it is a must.

Perfecto para trabajos de precisión

2026-02-06    -apgimenez

Desde que lo uso ya no se me cansa la muñeca, a pesar de que lo utilizo unas seis horas al día. He ganado en productividad porque, gracias a su gran bola, puedo situar el cursor exactamente donde quiero a gran velocidad. Los cuatro pulsadores de que dispone son grandes, sensibles y cómodos para usar. Aunque puede configurarse para que la pulsación conjunta de dos botones adyacentes sea equivalente a otro botón, esto no me resulta práctico porque es difícil hacer la pulsación simultánea.

Great product!

2026-02-13    -Cooper J.

I just got this trackball, first time using a trackball ever, i was delighted by how well this one works. the included wrist rest is really helpful especially for my hnda when on a hard surface, the ball rolls smoothly and with precision, the only slight thing is the scroll ring has a slight wobble to it, but it is not that bad, i am just very particular. but i do really like the scroll ring, i am able to operate the left click with my thumb and right click with my little finger. very easy to use and the optional kensingtonworks software is great, its not needed to use the trackball, but you can set so many options for the 2 programable buttons, the top 2 buttons are great, but you have to be very very precise about clicking both at once when using shortcuts, overall this was an amazing purchase, and i am impressed by the quality of kensington products