I just installed my new XZT2 last night and have driven about 25 miles on it so far. All I can say is WOW. Thanks to Quadzilla for the fast turnaround on my upgrade. 5 working days from ship to receive! This thing is smooth as silk compared to my original XZT. The power comes on a lot more evenly and I am far less prone to wheel spin (unless of course I want wheel spin!) I was going to flash it to the Max Mileage Tune to eliminate unintended wheel spin. That was my only issue with the original XZT. At $250 a tire I prefer to keep them for a while. This works so well with the stock flash that I am just going to leave it in stock tune as long as my mileage does not drop. Anyone else out there upgraded from the XZT original to the XZT2? No idea on the fuel economy vs the old unit yet. My original gave me an almost 2mpg boost. Just wondering if I can expect the same from this one. Thanks a ton Quad. Great Products + Great Service = A Great Experience!