I've got to say that Cobb has not handled this stalling problem with 04/05's well at all. A few days ago they deleted a 10-plus page thread on their site about the stalling problems, saying it "was hurting sales." Well, duh!
I was also very non-plussed to learn that, when I decide to remove my AP from my 03, the map I will be left with will not be the one it overwrote! (Puts a 4EAT map back on over the original!) That's just wrong.
All in all, I'm still a fan of Cobb - planning Stage Two very soon, and will probably not drive the car in stock mode anyway ever again, maybe even sell it to the next guy with the AP, so maybe not such an issue for me, but gotta say if I had an 04 or an 05, I would have to think long and hard about getting an AP for it.