Pros: Cheap and pretty good layout.

Cons: No scrolling of any kind. Ball falls out and often needs cleaning.

Overall Review: Just bought a Logitech Black/Silver Cordless Optical TrackMan and switched back to this mouse.

Pros: Nice features. Love the use of the forward/backward buttons with a scroll wheel all while being wireless.

Cons: I consider my self to have a pretty average size hand for a guy but, this is just over all bad layout design. The ball, right click and scroll buttons are all to far forward so your limited on ball movement. The left, forward/backward buttons force you to push the mouse inward towards the rest of your hand causing you to grip the mouse tighter. Right click its to small to use.

Overall Review: Move all features used for fingers closer to the hand and flatten out thumb controls so you push downward and not inward.

Pros: Big and simple to use. Just plug in and use from the box.

Cons: Kind of loud and no on/off switch so it constantly ran all the time when PC was on and case doesn't seem to help cool it at much. Had mine for almost exactly 3 years and it died. The disks inside stopped spinning and plugged it in other PCs and same thing. After some research it seem the motherboard on it has failed.

Overall Review: Wished there was more of a warning that it was dying so I could remove everything off of it before it died.