Mine is a STEP and my F30 DD and previous E92 were all auto's. A must for me in Atlanta daily traffic. Of the 3 I hate to say it but the ZHP is the worst of the 3 when driving aggressive, but still within legal legal limits of course . I have not serviced the transmission in the month or so I have owned the car but it does hold the revs high after flogging and for some reason I can't quite put my finger on, it doesn't feel quite as in tune with the engine like the other two BMW's I've had. I'm planning on some maintenance In the coming weeks to include a trans flush so maybe that will help but will also seriously consider the Dinan tune in the future.
2016 F16 Xdrive 35i Space Gray over Ivory
2005 E46 ZHP Convertible Monaco Blue over Natural Brown: aFe Stage I Intake, Turner Strut Tower Brace, H&R Touring Cup Kit, Yellow Fogs, Factory iPod interface. And lots o' maintenance stuff done.