Totally worth the money!
I've been a gamer for years and for the past two years i have been playing using Roccat peripherals. Those are very performant and well priced (40 euro for mouse and 60 for a great keyboard) and i've been happy with them. But my mouse has a few issues with it and the Arvo keyboard is just too small. So i decided to switch to Razer. I got the Imperator and the Arctosa and I'm impressed. the Imperator fits well in my hand for both palm and claw grip. It has a maximum DPI setting of 5600dpi and it can be changed at any time in-game, which is not possible on some mice. The only issue is that sometimes i press the backwards button by accident on the mouse, but i still believe, that for FPS gamers, this is Razer's best :)