I loved the RAC when I was with them. Really helpful guys, they always were friendly and helpful explaining what exactly was wrong, how to then sort it, and even went as far as sorting other things they spotted were wrong whilst fixing the primary fault, like seeing a broken earth that connects to the bonnet (does feck all) but they still fixed it. Another guy spent well over the time they're allowed to spend attempting to fix a car when I had an oil leak.
I'm with AA now, but only because it's the company my bank use. Otherwise I'd use the RAC again.