I find the optimal mouse! the surface like it very much, because I the gaming part is something schweisl this optimally. moreover my hand fits exactly on the mouse and it feels very safe. it slides very very fluid on my mouse pad (although this is actually quite old and a bit dirty!) At first I had a few difficulties with the accompanying program to the is there, all the buttons to confirm and set the DPI! I was about to return them because without the program are the 7 buttons "actually" useless in my opinion. but then I am again busy and lo and behold, I found the program! after the install is created on the desktop "Gaming Mouse Editor", but an error message appears when opening. now the solution: in my documents folder appeared at once a folder called "downloads", this is the "Driver" folder and in this a folder of times I think after the product number is named. And precisely in this folder is the application! "Gaming Mouse Editor", got me very happy because I could now keep the mouse :) with the editor itself I am not really busy, because unfortunately is not a guide while the one explains what you can do, for example, in the "Macro Editor" me this pretty since I Eigent hole've no idea what you can as a make confused! Anyway, I got the DPI mouse erhöt and jetz the mouse can no longer do better it :) corresponds exactly to what I was looking for! I hope now that I will use it very long