I have it, I'm much better with this controller then the regular DS3.
My Lines are much smoother, I've improved my laptimes with this.
The only cons i've read about other people having with this controller is that "25% Readout on the Controller" is 100% Throttle in Game.
So it takes a bit to get used to, but once you get the hang of it, You'll have a blast and you'll see yourself Improving.