Taking hands is pretty good, nice look, and the LEDs which are chosen color are a good idea (if!).
By cons, when I pass on a Razer mouse, I understand the problem. The Roccat is heavy, poorly slides (tested on several mats) is really unclear on small movements. In short, very bad at 50 euros.
Over time, it's getting worse. The side pads see their gooey glue melt and escape. In short: it was fingers that stick, and impossible to clean because the glue comes back all the time.
Moreover, the coating "gum" is actually a hard plastic covered with a transparent film gummed. You guessed it: the film does not take time. 12 months alone at home, and heat stroke has come to end.
I checked the forums: I'm not the only one with these problems.
In short: a very bad choice at this price.