Just wanted to share my experience and get an opinion.
Back in 2008 my local Audi stealership packed up and left. I took my S3 to a newly established local VW/Audi indy owned by a former Audi Master technician. Something happened which made me swear never to go back.
Over a few weeks I had spent @£1200 getting work done, inc cambelt, water pump, sparks - full service and cylinder head. I picked up my car from them and after a few days noticed an intermittent metallic tapping sound under acceleration, but couldn't work out where it was coming from - somewhere around under the front engine area. This persisted intermittently for a few days, but didn't seem to affect the car's performance. I had to take a trip up North that weekend, the tapping got worse and more persistent. The strange thing was it seemed to get better or worse depending on my speed, so I drove at whatever speed was affecting it least.
I was going to get it checked properly when I got back to London. On the way back down the M1 it got worse and the car started shaking. I pulled into a service station and looked the car over but couldn't see anything wrong. It was Sunday, getting dark and I just wanted to get home. I got back on the motorway and it had calmed down. I was in the middle lane doing 60-70mph when the front of the car started shaking violently and then suddenly the passenger side just collapsed. It sounded like that side of the car was scraping along the road.
I turned on my hazards, and luckily the cars behind saw I was in trouble and I was able to steer/scrape across onto the hard shoulder. I thought the suspension had collapsed - the wheel was wedged under the wing. I called the AA and waited 2 hours for the recovery lorry. I told the guy what happened. He jacked the car up and had a look. Turns out the garage didn't tighten the wheel nuts properly on that wheel and they had been working themselves loose over a few days. The plastic hub cap had stopped them from flying off - all five were intact. He put the wheel back on but couldn't let me drive it as the tyre was damaged and there could be other issues.
Anyway, I went to the garage the next day and told them what happened. To his credit he replaced the tyre, tracking, and repaired any damage to the underside of the car - although at no point did he admit liability. Unsurprisingly, I never went back there and took my car elsewhere. Since then his garage has won 3 Audi Indy service provider awards and gained a very good rep as a VW/Audi specialist.
Would any of you consider going back to a garage if you had the same experience as me?