Just to testify about how incredible this tune and flashing process is, I am the one who wrote the E46 M3 review that Paul linked above.
It was a great pleasure working with Evolve. They remotely live tuned my car across the world using the evolve-R cable and the dyno location of my choice. Everyone at Evolve was a pleasure to work with! The dyno operator who was working with me in Chicago was very impressed with how simple it was to load/unload the different tunes on my cars, as well as how they fast they were with making beneficial tweaks to my tune.
I am definitely looking forward to trying this tune on our E90 M3...I just gotta finish a few more things on my E46 M3
I highly recommend the evolve-R tune. There is nothing else out there on the market like this, especially for the price they're offering.