The subject is too small for my paws. At first I took steel series rival 3, but jumped sense. It was just perfect for my hand, although the LMB and RMB are squeezed there, but I thought the sensa was jumping because of the mouse and changed it to a subject. However, the matter seems to be with the PC, I suspect it was due to overheating of my motherboard (you simply canโt find it cheaper on am3 +), there the USB periodically fell off and the bridge got very hot, fortunately the mouse is in those USB that do not fall off.