I've also had the AP stage 2 for a couple months now and I couldn't be happier. I had an MBC with my turboback (with high flow cat) for 2 years and always had to watch the partial throttle. It was killer watching egts going up hill too... either no boost, or WOT. But now, I have ditched the mbc and couldn't be happier with the AP. It was the easiest thing to "install" if you can even call it that
. And the power is great. Really smooths out the power, and the car just keeps pulling and pulling now even in the higher rpms. If you thought 2nd gear was good before, you'll have a whole new respect for 3rd gear afterwards.
Just wish I had made the jump earlier!