I like this mouse very well. I was surprised quite positive for this price. Is very good in the hand, looks chic, keys could be use as well. I usually zocke MMORPG, because I need some keys. So I have also assigned to the mouse wheel, a function, so the click, so to speak (middle mouse button). Unfortunately, she has been already broken after some time, probably in Schol that they already had gone a crack in the production. In my review following, I was contacted by CSL to solve this problem. In a very pleasant and competent way, I was offered to replace this product. Since I needed at that time no more mouse, I even got another product from the CSL portfolio, which was 10 more than the value of the product itself. CSL attaches great importance to customer satisfaction. I can only recommend any products at CSL to buy when there are problems, this can be solved by communication 1A. I'm very satisfied. Thanks CSL.