I ordered the last one, last Saturday. Got it on Wed. He was supposed to be getting more in this past week, though. Tried Tow mode, and performance mode, so far. Tow mode, didn't see a lot of difference. Power is more noticeable in performance mode. Extreme mode is next. I still haven't seen any smoke, but I haven't had it long enough, or got on it hard enough, to really test it. I have noticed my EGT's drop back down quicker, when I go to shut it off.
Jim