Unfortunately I suffer like some other under sweaty hands while playing. The G502 took me a few minutes later a sweat. The Sharkoon after 12 hours of use is not even annäherend creates. My hands are as they should be, dry, thanks to the cool surface.
Quality is fine (also Logitech's just plastic), although the scroll wheel is noticeably worse. The middle click is spongy and the rotation is not quite accurate. For the Sharkoon costs only 12 ridiculous compared to the G502 currently at 65 !!
I make just as good as with a Logitech. The weights I fande always uninteresting. The Sharkoon has another advantage, it is larger and so is my hand enclosed on the mouse, I like it. But at last no more sweaty palms and no smear in rich 50 price difference. About the life I'm at a 12 not worry. Because I can buy a new one from each year.