Summary: I used to buy high end mice from a major input device manufacturer. They almost always had button problems shortly after the warrantee expired. This mouse tracks well, is accurate enough for perhaps all but the most talented twitch gamers, and if it goes bad, I'll be able to afford a new one without...
Pros: I have medium sized hands and find this mouse very comfortable. Great price. No annoying lights on top. Tracks on a much wider variety of surfaces than my big name brand laser mouse.
Cons: Cord is about 6 inches shorter than I would prefer
Summary: Would probably be fine for traveling or if I just had like child or otherwise small person-like hands. Or if you were cool with having a small mouse in general.
Pros: Affordable (can't beat that price) No LED lights to deal with Might be nice for someone with very small hands
Cons: Very small (like 4 inches or something). I read some of the reviews that said "as long as you don't have like gigantic hands you should be fine." I don't consider myself as having big hands, but even for me this mouse was just too small and felt uncomfortable.
Summary: Bought a Gigabyte M68020 mouse for about $10 from new egg. So far so good.
Pros: Got this mouse for about $12 bucks after mail in rebate as I recall. Worked great while it worked. Tracked fine and all the buttons were a plus. The thumb rest was nice too.
Cons: Scroll wheel failed a little after a year (has a 1 year warranty). It works but it skips back up when scrolling down. Annoyance that I couldn't put up with. Movement of the mouse was fine however. For the price I can't complain too much but mice should defintely last more than just a little over ...