[clived]

I'm running an Evolve map - I had one on my 135i for over 40k miles so it was the natual choice for me. I previously have been a DMS customer - they mapped my 535d back in 2005 and it made a great difference, but for the 1M they lost credibility for me when they stated that there were no gains to be had from an exhaust or FMIC on the 1M - which has been widely disproven - both on my own car and many others.

I've run Evolve's maps on my 1M from just after run-in, with the car otherwise stock, with FMIC and cat-back exhaust and with decatted downpipes - no codes, no issues and great customer service.

I don't think anyone does maps switchable on the M button, but Evolve have their "R" cable, allowing you to switch between stock and mapped at home using your laptop.