I once had a Saitek Cyborg Gaming Mouse ... which went eventually broken. Then I bought this mouse. Of course, top product, everything was perfect, but the mouse has failures. Speak while playing it may be that the mouse stops responding (without warning, without reason) and then when you play online which is very annoying. Eg in the middle of the League of Legends Team Fight the mouse without reason is no longer. Then I need five seconds to the USB cable new zuverbinden, then everything is working again immediately. At the USB port it is not .... Too bad. Presumably, the technology behind it is not identified for long use.