I have posted this in other places, but with a trifecta tune depending on where you live really helps the 0-60 time. I am at 5.3 0-60 in Utah which is pretty high above sea level. And 290hp over the stock numbers. It is a bit of a learning curve, but I have been able to drive this car mildly but enjoy spirited driving much more.You're totally right. This tune really woke this car up. I can tell the torque has really increased. As I went over a bump on the freeway my traction control light came on cause my front wheels broke loose at 80mph. Michael had me wipe the computer clean on my car after the first tune was shifting a little rough. I cleared all tcm from the car. Then he had me click on "force full flash" when I installed the tune the second time. He claimed it resets the transmission so it has to relearn my driving habits now but man it is much smoother and so fast. On the freeway it's insane. One question I gave is when I push the gas and have the car downshift on the freeway. When the rpms get to 3000 it seems to wanna jump to 4000 really fast. Like it almost downshift again and skips 3000 to 4000 rpms. Maybe the transmission is still learning since Michael said it should take about 2 days to adjust to me and to not use the manual mode till the transmission tables have a chance to have some data logged down. So after the second tune it's a fast car. Amazing
My wife is back to driving the GS now, so I only drive it on the weekends.