Post #1806 will give you some numbers.
http://f30.bimmerpost.com/forums/sho...450585&page=83
I have been very pleased with my MHD tune. Daily driving/spirited driving it's flawless.
I am a bit frustrated with it on the track. There is some hesitation/stumble in the higher RPMs at WOT. Definitely not a deal breaker but it's there and I hope it can be further sorted out.
My earlier logs showed torque limiter issues and some timing issues but all of that has improved. I think some if not most of my issues on the track could probably be addressed with better/higher octane fuel. (Crappy Cali 91 also seems to often vary in quality.)
I've essentially flashed it and forgot about it as the car runs strong and smooth. I now just need to spend the time to figure out how to address the issues I'm having running hard at the track.