You know what, I never was a big fun of all this automatic cruise controls, but after your write up I can see few reasons to love them as they can be quiet useful around London and M25.
I've changed my mind now, its just the shame I haven't got one on my 8
This, 1) It disengages at 20mph, which is very annoying in crawling traffic, sounds like a possible ECU upgrade or even a VCDS job, but this, 2) It can be slow to react to people cutting into your lane etc, could be down to processing speed and better/upgraded processor on the 2nd gen acc??
Anyway, its interesting to hear your experience with ACCs because as I said, I didn't liked them...until now
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2006 D3 S8 5.2 V10
Ceramic Brakes, Bang&Olufsen, DTV, DAB, Rear Camera, BT, TPMS, Soft Close, Auto Boot, AMI , 4 Zone AC, Home Link, All Electric Blinds, Fingerprint, Ski Hatch, Black Extended Leather, Heated Sport Seats, Alacantra, Carbon Trim inc Aluminium Pack 2.
2015 A3 S line 1.4 TFSI - for the missus to keep her away from my car.
Standard S-line equipment, no extras.
2006 D3 A8 3.7 V8 - SOLD but not forgotten