So far I've not had any really major problems with garages - most of the issues have been when I've taken the car in somewhere and as I'm talking to them, I start to realise that I know more about fixing this car than they do. I understand - obviously I'm going to know my car better than someone who works on Fords, Vauxhalls, Renaults and the like, but there have been times I haven't had the tools or the time, and it's a horrible feeling trying to explain the idiosyncracies of my car and the mechanics are looking at me like I'm telling them to jack the car up to change the air filter.
One of the things I hate more than anything is dishonesty, and that covers not telling me something as much as it does lying to my face. When I had my MoT retest done at Kwik Fit, they nicked my battery cover. The guy behind the desk there had a MK1 and was obviously missing his. They probably think your average punter isn't going to lift the bonnet from one year to the next, but I was cleaning my EGR the next day, so having a bright blue Bosch battery on display when it was normally under the cover just really got to me. Even worse when they told me they wouldn't have touched it. After an hour, they called me back and told me they'd "found" it in a cupboard, and then said when I picked it up that they had to take it off to fit something to the battery terminals. For an emissions test?
A few years ago, had my nearside rear lock module replaced. Had a call from the garage asking me "it is the front door you want changing, isn't it?". When I get the car back, everything seems fine, but at the time I wasn't taking passengers, so it wasn't until a few months later I gave my mum a lift and when she opened the door, a couple of Torx screws fell out of the door, and the door card fell off. They'd taken the front door apart, then thrown it back together without the bottom screws, or hooking the top of the door card over the top of the door. Worse still, this was done in the middle of winter, so I didn't think to open the windows until it got hot. The window stayed in place - they hadn't replaced the peg and dowel, so there was nothing holding the window in the carrier.
Same garage charged me a fortune for diagnostics when I brought the car in with a flashing light on the dash. I forget which one it was, but if I remember, there's a light on the dash that flashes when your brake bulb has blown or something. I've got no idea what they were doing all that time, but they charged me for it. Just tell me if you can't do something - when I find out you've screwed me over, there's no chance I'm going back.