BVW good, Bath Road not so
Again, old thread but I thought I'd briefly give you my experience.
BVM, seemed hard to get a loan bike so I didn't bother. BVM seemed reluctant to book my bike in (it was when the 1200GS was being launched). However the service from this point was good, I really took to them. As for the quality of the work, no reason to doubt it.
Bath Road, seem pleasant enough, but to me seem a little inefficient, I had quite a lot of hanging around while they got themselves organised (I was a bit pissed off at this), service seemed very expensive to me (and they didn't wash the bike, which pissed me off more when I though how much dosh I gave them). BUT, my GS feels like a different bike now, smoother, quieter, like a new bike! Fantastic.
All thinks considered, I will be doing the more routine service stuff myself in future (to save on the excessive service costs), thinks that need special tools/skills will be going to BVM.