Four times I've had to use Roadside assistance, and all have been RAC.
First time the Bora failed to start (under warranty/VW roadside assistance) and RAC came out. They were excellent, and it was just a corroded battery terminal (on a new car?).
Second time the doors wouldn't lock (again under warranty/VW roadside assistance) and VW came out. Diagnosed a faulty interior light blowing a fuse, booked it into VW through their priority service, and effected a temporary fix.
Third time the wipers failed on the Altea. RAC came out in the pouring rain at the Metro Centre, sat in the car with his soaking overalls on and soaked the seat, used the car mat to kneel on while he checked the fuses, claimed he couldn't find the problem so it must be something he wouldn't be able to fix, sprayed the windscreen with rain repellant spray and told my wife to drive fast enough and the rain would sheet off. Got in the van and left, despite being asked by my wife if he would recover us home.
Fourth time, wife slipped the clutch constantly in traffic and overheated it (
), and couldn't get any gears. RAC came out again, tried to get her to learn how to change gear without the clutch, told her to take it steady and just stick in one gear all the way home and she'd be fine. Again, 40 miles from home in Newcastle.
So, for roadside assistance, I would say anyone but the RAC.