I once had a completely immobile car; they walked down and pushed it. Had another car with a possible ECU fault which they couldn't diagnose; they didn't charge me for the two hours they spent looking at it. Every time I've had work done in there they've done it for the figure quoted or less. The stealer once told them a headlight was only available complete, I discovered (on a forum like this) that the adjusters could be got elsewhere on their own-when I told them his, and where to get them, they were genuinely interested and still happy to do the job.
I haven't used them for a while, touch wood, because I have a Citroen