Personally I couldn't care if mine has 100bhp or a 1000bhp. It's all about how it drives on the road for me. The power from the car is immense and the delivery superb, as has every car they have ever done for me. The Golf R I drove, and the Scirocco R I had for five days (while my bumper was repaired), both seemed positively pedestrian by comparison to my ED35.
I have tried Brodie Britain Racing years ago (1989/90), Superchips, REVO, APS, Van Aarken, Paramount Performance, ChippedUK, DMS Automative, APR and AMD. I can honestly say that all roads lead to AMD from my experiences. I'm sure we've all had bad experiences of one kind or another. I did with BBR and ChippedUK. But so far AMD have never let me down and when I had the mechatronics unit replaced on the R36 (thankfully under warranty) I took the car back to AMD to have the DSG remap redone and they spent nearly three hours on my car for nothing. Including solving a problem the dealer could not.
Nothing has ever been too much trouble for AMD, and on the two occasions the my A4 and R36 had problems AMD were the ones to solve it. Some of the guys that worked out of Bicester when AMD were there have gone on to run their own companies very successfully. I'm not sure what the VAG scene says but I can't fault them. I know lots (not just VW) who have used them and never heard a complaint.
I'm sure this is a debate for some but at the discounted price I paid for the remap and exhaust, it is the best money I have spent in a long time......