Currently on a e30 tune session with adam. i had about 4 stage 3 revisions in one day, so the speedy response time is definitely true. As far as power wise, its feels much smoother than my prior tuner, and we've addressed some things that make it a lot safer also. On a base map e30, there IS a small gain the butt dyno will notice.. so im pretty excited sitting here at work with my laptop patiently awaiting my revision from the log i already sent. Then im sure my car will feel like a little monster. ...before the turbo upgrade anyway