Here is everything you need to know about the 2 tunes on the market.
http://www.1addicts.com/forums/showt...ht=procede+jb3
They are both basically undetectable, for the JB3 you can pickup the Can tool which will clear all codes and etc before you take the car to the dealer. I personally went with the JB3 since it was a choice of 380$ vs 945$. Procede may be slightly better right now but JB3 is coming out with an upgrade soon so honestly paying 500-600$ for a Procede isn't worth it.