I've only used the AA to tow me home if absolutely needed. If I can't fix it at the roadside to get myself home they certainly can't.
Had one guy come out when the diff in the box exploded. He told me he would tow me home which I said he couldn't as the diff had gone bang and the driving wheels were locked. He then proceeded to tell me about how he'd had loads of RS's and then said he'd even had a Scorpio Cossie which was the fastest of the lot as it was a 2.9 instead of a 2litre. clown