Took mine in for its first service yesterday, removed the MTM M-Cantronic but left everything else in situ. Also had my MMI cable and S3 keyring replaced - cable has been a bit hit-and-miss, and the keyring had split!
Alice the Service advisor LOVED the car and we ended up having a long chat about her amplified TT TDi and how best to tune it!
In addition to this, I am looking into buying those red air vents - but attached to this...