For my '05, Doug could never get the tune right. I don't know if it's because we had an early Steeda intake or what... but no matter what, he could never get it right. Brenspeed was dead on.
That said, Doug hooked up a fantastic tune for my '07 that took .3 off my 1/4 compared to the tune from Brenspeed. And I'm confident that with a different intake and tune from Doug, my '05 would've been in the 12's.
Brenspeed is better than a canned tune from SCT, or even the tunes that come from Steeda (because I changed from the Steeda tune to Brenspeed and it was far better), but Doug definitely goes further into detail with his tunes. It shows by the fact that he tunes for performance, torque, and all out racing, instead of just a performance increase tune.
Don't get me wrong. Brenspeed has fantastic customer service, extremely fast shipping, and I'm sure does great dyno tunes. But for a email tune, I would choose Doug.