We're with the RAC, never had a problem with them. On the couple of times theyve been called I can honestly say they were very good.
Why did we go with them in the first place? Simples, Many others, the AA included will NOT recover your vehical after an accident. Slide off the road onto a muddy embankment and get stuck in the mud? They wont help even if the cars undamaged.
My SO had a little bump in her car a couple of years ago and was too shook up and scarred to carry on driving even though the car was perfectly drivable. The RAC came straight away, and offered to bring her and the car back home, which she was very thankfull for. The AA would not have come out.
Freind smashed car up on motorway, I was a passenger, His AA membership wouldnt cover accident recovery, used my RAC membership to come and collect us and saved him a fortune! within half an hour too!