If this was a 30 pound mouse I would give it 4 stars, but for the price it deserves all 5 starts.
The dpi settings button actually has 3 settings on Linux. The first one is pretty slow the middle one is about right and the last one is way to fast.
The side buttons are in an odd position that make them hard to use. The two buttons default to paging forward and back in a web browser.
The size of the mouse is pretty large compared to other mouses. It is a bit bigger then Microsoft Comfort Optical Mouse. It also makes your hand a bit sweaty after long use because of the type of plastic in use.
The mouse wheel has got a bit of play in it from side to side but nothing to bad. The wheel has got good feed back. Scrolling, middle clicking ect.
This is the first laser Mouse I have owed. I was a bit shocked when I plugged it in and didn't see any light. I thought it was broken :)
Overall if you are looking for a new mouse I can't really say anything really bad about it. Going from Optical to laser you will notice the differences but its not as big as a differences I would replace a working Optical mouse with it. Not for every day use. It does make a bit of a differences in FPS games.
Conclusion. If I could buy a different mouse would I? Simple answer no. You are not going to be able to get a better mouse for the price.