I have just purchased one of these around 2 weeks ago to replace my Razer Naga edition from last year.
It is so comfortable, and the rubber sections at the sides really do make a difference. Not enough a difference if you've got the previous DA edition though.
For FPS' it's excellent. I play BF3, TF2 and CS and it feels great. Being on sale too helps so get it while you can if you're thinking of upgrading.