My main concern with the mouse was that it was wireless and that it had a charging dock, so I'd theoretically never have to plug it in. But previously where the dock stopped working after a few months, I got mine exchanged and it works fine now. However, I don't have high hopes seeing as how it went last time.
A bigger concern would be the shape of the mouse, it is very flat. Where other mice are easy to grip with your hand, the Viper Ultimate basically requires you to use a claw grip. Due to the shape of the mouse, your hand has nowhere to rest without holding the mouse quite far up.