i have a service plan with them so i get a free courtesy car anytime mine goes in (had a up once and a polo a few times)
they also did my rust issues and give it a clean (although not a good one but better than nothing!)
i find i do need to chase them up when my cars in to find out if its ready to collect which after i do, they tell me it is which is annoying but they do have decent deals on which always helps!