I'd like to say I had a fairly positive but mostly neutral experience with PDX. When I was ready to spend money with them they were prompt via e-mail.
My map does not feel more powerful than the Cobb map, and to make matters worse, the car began backfiring between shifts (normal speed, not high speed) immediately. I flashed back to Cobb mapping and backfire was gone.
Alerted Tim my assigned map maker and he said it was weird. I sent many different ECU Explorer logs and he said they would revise the maps. Never heard back.
Get protuned... I feel my $150 was lost. I would only use PDX for a live tune. If your car is on the dyno, they won't leave you hanging like they can via e-mail!