I take it you know which shop I'm speaking of haha...well I took it there once on a Saturday as advised by a mate at work, and a girl at work. They're both good friends with the guy who more or less runs it on Saturdays (as they're not open for general business, more just cash as a second job that they enjoy), and it's the chicks ex as well. It appeared as though there was about 5 guys working there on the day, all relatively young, and by appearance you wouldn't trust them with your hair let alone your car...particularly the fella it was organised through (looked like he just got out of LA county jail or something lol)...regardless, the guy himself was VERY polite and easy going, and they did an absolutely wonderful job. Naturally I also noted the trip meter before I left the car with them, and it only went up 100m-ish...which is roughly the disatance they drove the cars from where I dropped it off, into the garage, and to where I picked it up.
This is only really my personal experience with these guys, but since they're running it in their own time on a Saturday for some extra cash, it seems a little more honest, and that they're not there to joy ride etc