I've had the unit operating only two days, but I've put 300 miles on it: She's a beast and that is for sure. Have to work out the bugs in Sport mode, as it's shifting too quickly unless you floor it. Hopefully my Tazer can help straighten it out. Normal mode is fine and when you floor it, hang on. One thing that surprised me, is on my normal 140 mile lake run loop, it was 36 degrees out and the standard car would get between 19 and 20 mpg average. This thing with the supercharger pulled it up to 26.3 mpg. Seriously. Today I ran the loop again and it was almost 60 degrees out and without resetting the average mpg, it pulled that score up to 27.4 average mpg. In a 4,000+ pound car? The motorhead in me says this is impossible, but there it is. Obviously my engine just loves it's new supercharger. Thanks Ripp, the wait was worth it. If you have a pedal commander, take it out. Ripp's tune fixes the throttle lag problem and the commander on top of it is too much. How do I get it to stop chirping like a bird? It only does it at certain time when the blow off valve is trying to decide what to do. But a whistle tone, like at idle, would be preferable. I always said my Charger is the best car I've ever owned. But this? Words almost fail me. If you can afford it, BUY IT!