Considering SCT tuning

i had my car tuned on a dyno with a SCT chip and it turned out great. my buddy had his LS1 camaro tuned at a shop in Jersey on a dyno and while the car was faster it had drivability issues. He later on took his car to F-body central and they tune with the lap top in the car on the road under real conditions. Now not only are all his drivability issues gone but his car is faster yet. He now runs 12.4's with the stock motor and auto trans. The tune cost him 250$. so if this guy you talked to is really good, you will probrably get a good tune. Whatever you decide,make sure the tuner stores the tune you currently have on on of the slots so that if he makes the car run worse you have somehing to fall back on.