Does not wotk with Intel based Macs

I bought it because it stated that it was compatible with Mac OS X 10.2 or later. Well I have a Mac pro and the mouse cannot be configured because it is not compatible with Intel based Macs.

decent mouse for precise work

i bought this to replace the stock mouse which came with my apple imac computer. This mouse is fairly large, which is nice because it fills the palm of the hand and doesn't feel cheap, light, or "plastically". I've tried it on Mac OSX and Windows XP with no problems. It would be nice is the software allowed you to increase the scrolling speed, and tracking speed, and assign more custom tasks to the different buttons. One other thing about this mouse is it has a more slow, precise way about, perfect for drawing/drafting work. But those power-users who prefer a lighter, quicker feel for moving windows around, and performing a lot of rapid, in-precise movements may find this mouse a bit restrictive.

Good Upgrade Choice

I had orginally planned to get a wireless mouse, or maybe even one of the fancier Logitech mouses (mice? ;-). I finally decided I didn't really need all the fancy "bells and whistles" and bought this mouse by Kensington.

I think it's a good choice if you want to upgrade from the standard mouse that comes with most computers. The footprint is only slightly larger than a standard mouse but it's quite a bit taller, which I like. I have medium sized hands for a guy. It was easy to install both the mouse and the included "Mouseworks" software (you will need to load the software if you want to reprogram the two extra buttons on the side of the mouse). The software also gives you a number of options in the use of the mouse (more than the standard ones that comes with Windows).

It feels good in the hand and I'm satisfied with the product. I particularly like the feel of the wheel. It's not perfect however; the two extra side button could have been placed just a little better for my use and  more

More than pleased!

A mouse is a mouse is a mouse is a mouse......or is it? I was apprehensive about getting something other than an Apple Mouse, but this Kensington mouse exceeded my expectations. It just has a good 'feel' to it. I like its design and the way it comfortably fits the hand. Kensington 72257 Ci20 Optical Mouse for PC or Mac

Great Mouse For The Money, Not For Diehard Gamers...

After dropping over 40 bucks on a Logitech Mx518 which broke down after about a year, I did not want to spend a lot of money on a new mouse. After much "research" & reading the reviews here, I decided on the Kensington Ci20 (I was able to purchase mine for just over 20 bucks). The mouse is very responsive and has a great feel. This is primarily due to the rubber side grips and ergonomic shape. The Ci20 is larger than my "old" Logitech; consequently, it may not be a great choice for users with smaller hands. The mouse is responsive, but may not be "quick" & accurate enough for diehard gamers. If you are buying this as a gaming mouse, you may need to look elsewhere (I recommend the Razer Diamondback Acid Green). Even though the Logitech I used previously was buggy with my USB ports and the buttons gave out after about a year, it was much better for gaming than the Ci20. However, if you are not a dedicated gamer and are looking for a great mouse at a very reasonable price, the Ci20  more

Great price and features.

Smooth and accurate tracking. The extra buttons are a useful addition. Does feel a little big and moves on a smooth surface with less tension then I would like but a good overall value.

Great price and features.

Smooth and accurate tracking. The extra buttons are a useful addition. Does feel a little big and moves on a smooth surface with less tension then I would like but a good overall value.