I found this to be a very good mouse, overall. The size is good for my hand. The weight is perfect. The housing is coated, for the most part, with a rubber that feels very good between the fingers. The battery is inserted in a very elegant manner - angled off to the left. My wrist feels very good using it. The catch for the battery/receiver compartment is solid and well designed. The mousewheel is soft rubbery and indexed, and it rolls well under the finger. The range is a little bit weak, I suppose, but you wouldn't notice if you have the receiver close to the mouse; I guess that's what you get with a mouse which is powered with one aaa battery. And I wouldn't want the extra weight and size which would be imposed if it took two aaa batteries.

The mouse has an on/off switch on the bottom - which is very pleasant if you want to make sure to save the batteries when not in use. There is also a button which controls the speed of the mouse cursor - 800, 1200, or 1600 dpi. I'm not sure why mouse manufacturers have felt compelled to add this feature. You can usually easily control mouse cursor speed from the operating system mouse control panel.

The only drawback to this mouse, is that apparently there's some weird firmware which controls the way the mouse feeds coordinates to the computer. If you move the mouse quickly, there isn't a one for one relationship between how far you moved the mouse, and how far the cursor actually moved. It is slow for the first half a second, and then speeds up... The general effect, is that even with varied speed of the mouse on the pad, the mouse cursor motion stays even. It's very odd. My reason for buying a laser mouse was the increased precision I would get from it... and this mouse's motion feels kind of sloppy. Basically, I find that I have to move back to buttons after overshooting them. And one has to move very slowly if you want precision, which I find increases strain on my wrist.

My guess is that because there is some weakness to the mouse's wireless signal, this sloppy motion tends to hide any actual hesitations, which happen because the signal didn't get through immediately.