I spent nearly 1 hour at FNAC to seek a wireless mouse, ergonomic, portable, nice and cheap. So I eliminate attributes to As, and end up with a huge mouse, wired and has over 30 ... I come here on Amazon and I found the pearl. Cheap, of good quality, very nice, not too small nor too big, perfect to carry in my bag to go to class and make parts of CS: S during breaks;) The only flaw, but it is my choice inherent in that product itself, mouse intermediate size is not great for precision work on Photoshop, but you do it with some wrist pain. Otherwise, I am completely satisfied so far! I recommend!