yeah i went with him. i got a 91 octane tune and that helped. but in my opinion it wasnt CRAZY good. it was just a solid tune that brought some more power. i think the car needs some gears because i can only screech in second, not into third even with traction control off. and so i think its a good tune but not that impressive. im not saying i would go anywhere else tho...
If you surf any mustang forums you'll hear about Doug at Bamachips and Brenspeed as being the No1 tuners out there. I ordered from Bamachips and am very happy. Doug is a one man band so his stuff takes awhile to get shipped (2weeks from order and mine was in hand, I'm two states away from him) but it's well worth it.
the car has greater low end power and awesome throttle response. But the car doesn't feel faster than it did on the last tune. We trying to get things straightened out. Doug is great.