i just got confirmation the Cobb tuning does fix the rev hang. so thats a reason to get it if nothing else. rumors are it only gives like 20hp gain, but if you add a Bren Tuning file to your cobb instead, it can gain 40-50hp. But then its like your paying twice.. once for the device, and then another company to send you a map online.
One guys quote:
Actually it does that too, almost forgot. I want the Cobb AP mainly for drivability, the smoother throttle/boost schedule, and rev hang fix, more than for more power.
Another guys quote:
If you want more power, Bren Tuning offers e-tunes or dyno tunes with the Cobb AP. They're averaging around 40-50hp and 50-60tq on a 100% stock WRX with just the tune.
The Cobb Stage 1 OTS tune isn't worth that much, like 10-15hp from what I've read. Custom tune from Bren seems to be the way to go, or a dyno tune.