Price foremost

Do not imagine having a mouse event. The mouse is lightweight, small (large hands abstain), slip badly because of fingers that often end on the carpet (but that is as much due to my big hands that has the mouse;)). The buttons seem to have a good answer, and do not look too fragile.
To reserve a moderate use of the computer anyway. I bought this mouse to my in-laws who have very limited IT practice. The quality of plastic is marginal, skates seem teflon ... The receiver of storage is under the mouse, and it looks pretty cheap air at the same time less than 10 do not expect was something else.
The optical effective air for what I could see, as far again, at that price, I would not bet on its longevity with frequent use. For a more traditional use it does the job.
In other words, if you search for the price and if you do not have a video game use, or too demanding then this will suit you, if not, go your way.