I had my 350z uprev'd today. What a massive difference it's made to the car.
I was making 280bhp and running lean, after TDI North finished, I was seeing 301.7. The torque curve looks perfect, and most importantly it drives a damn site better than it did. I didn't expect very much, but the throttle response is fantastic, Uprev'd has totally transformed the car, if you haven't had it done you don't know what your missing.