I've tried mail-order PCM tuning, it doesn't matter who's. After swapping the PCM out 3x times I was not satisfied, I had problems from the start with poor shifting, lugging in gear, etc. I'm not saying this is the norm, because it's not, but I decided to cut my losses and get dyno tuned.01/18/2006: Dyno tuned by Synergy Motorsports in Fremont CA.