Funny to see Alfa get a mention as it was only a week ago our Alfa was already in the shop
To be fair to Alfa, it was a dodgy turbo gasket which they swapped out in under 2 days and while it was in we had a newer and higher spec car as a replacement while they did it. They are very communicative too, explained to me and the missus exactly what they had done and why. Much better than the other places I've been before, bar Nissan in Slough, but thats because I harras them all the time.
SEAT, Renault and Nissan in our local area I've had crappy experiences with.