Summary: After 15 months, 2 weeks the mouse wheel just stopped responding correctly, and now skips a few rotations here and there. This mouse worked really well on a PC that is used 16 hours a day where mouse is used all the time, so I've had better luck then some here.
Pros: This is an updated review. I've used this mouse for just over 15 months. Feels good, tracks good, very nice for the price (was only $10 at time of purchase).
Cons: After a few months of ownership,,, once in a great while it would just randomly act as though someone had moved the mouse wheel one notch. I didn't have anything critical tied to the wheel so it really wasn't a problem for me.
Summary: I was hesitant when I was buying this mouse because I read the reviews and heard that the sensor goes bad quick. I guess I was kind of lucky to use it for a year and a few months.
Pros: The mouse was flawless when it actually worked. It was pretty comfortable. It fit perfectly in my big hands.
Cons: After a while the mouse sensor goes really bad. As others have said, it stopped working on mouse pads and doesn't react to movement at all. It would start stuttering and even stop moving. I had a nice time using it on a piece of paper for a while till it barely worked there.
Summary: I selected 4-7 day shipping and they shipped it to the wrong address. So now i have to wait 7-10 days to file a claim and have them look at it and then wait 1-2 more for them to ship it. So im going to have to take 2 stars off for that but all in all its a good mouse.
Pros: Good overall mouse. I've been to a friends house to review it before i bought.
Cons: It might be a bit uncomftorable for people with small hands.
Summary: I found this mouse by doing a search for a cheap, right-handed mouse, and the only thing right-handed about this mouse is the placement of the thumb buttons. It's essentially an ambidextrous shape and when you're used to a mouse contoured to a natural grip, this mouse is painfully uncomfortable.
Pros: Cheap, adjustable DPI, accurate tracking.
Cons: The shape of the mouse is so uncomfortable that I've switched back to my old broken Intellimouse Explorer 3.0 until I can afford a new Intellimouse. The thumb buttons could be slightly lowered to be easier to reach.