We all have to go down our own path. My first tune made me slower. It was super rich. However, they kept at it with no additional charge to me and after a long distance dyno tune I got great results. Later I discovered a leaking intercooler that was fudging up the canned tunes. No wonder what worked for others was off for my car. I'd be comfortable saying it was worth 20 hp conservatively. I can't get more specific because I keep changing my modification list with some retunes along he way. E/C is great in that they will keep working with you along the modification road.

Les