I use the mouse since the beginning and I can only say ... thank Team Razer !!! If I had read that correctly, the CEO of Razer's own left-handed and I hope that he still has the courage to develop a gamer keyboard where the macro and additional keys on the right side are. Then I search already for a long time, but could not find anything useful so far, except for the "Saitek Cyborg" and "Tt eSPORTS Challenger" times as a small tip for us highly gifted: and P ... No seriously brings you mouse Enjoy life about it, because the quality is good and it even after you get used to the mouse it starts to make fun to use it. I will admit that my hand had suffered the first 2 days a little and a little hurt, because they had to get used to it first, so do not wonder about it ... LG !!!