I was initially a bit skeptical because I had never heard of the brand Perixx something and the price was or is indeed relatively low. But I was taught, because this mouse is just 1A !! I have to be honest can not fault it. I especially like that you can reinopacken zusäzliche weights (because I personally prefer something heavier mice). Is very comfortable to hold and use the supplied software you can adjust everything at will. Would I buy again and again !!