Finally got the tune on my car and I must say this is how the car should come stock. Granted I was spoiled with the power output the tunes would put into my N54's, but the stage 1 tune is definitely worth the $380. I did a couple runs, and I know I am still waiting for the tune to settle in, but for now I can definitely feel the difference. I will definitely report back, after a couple days to see if the tune has completely adjusted.
FYI for anyone planning to install this in the near future, do yourself a favor and remove the airbox to get to the secondary sensor and you will save some skin off the top of your hands and some sanity.
2012 535i M-Sport
Previous BMW's: 87' 528e / 04' 325i / 07' 335i / 08' 335i / 08' 535i