So a friend of mine got a tune from a guy local here. Based it off of the base X4 tune with some "tweaks". Me and buddy went for a spin in the car and I couldn't feel any difference in get up and go, but throttle response was quicker. So we tested it against my Camaro. Sure enough, I beat it dig/40 roll with ease. Guy made all kinds of excuses as to what went wrong etc. So, we wiped his X4 back to stock to enable the base SCT tune that comes on the device. Went and did the same runs, dig, I pulled him badly, (driver mod needed badly....lol.) but the 40 roll, I only put 1 car on him. So, same guy calls me out and has another Mustang with his tune. We go to our testing grounds and do 2 digs and a 20 roll, his call. I kicked the **** out of him just as easily as if it were a stock 5.0L on all runs. The best part is, my buddy running the SCT base tune kicked his ass as well, dig and roll. SMH........my buddy wasted $150 on that "tuner" who claimed to be so good and I told him to go with a Lund tune right off the bat. Best part of all is this guy didn't have **** to say after the ass kickings except that he's going to "revise the tune and pull more power" because of excessive wheelspin.