I just installed BM3 Stage 1 93 octane on my N55 PWG. All I can say is wow! The car pulls so hard through all the gears, and really pushes you into the seat. Acceleration from 2k to 4k RPM at highway speeds is very quick. Also, the throttle response is very linear and there is no longer a rubber-bandy feel at a low-speed start in COMFORT/ECO. I've only spend a couple hours driving so far but drivability is the greatest benefit over a piggyback. Also, hearing the burbles put a smile on my face
I also want to thank
mike@x-ph.com for hooking me up with BM3 at a great price. Excellent and quick customer service so I know who to go back to for future mods!