Agree that TMS are pretty good. You have the alternative of MBS at Marsh Barton Exeter, which would be not much greater journey time, and also very good.
Steve
There's also Mercare in Plymouth (near the old Roborough airport). They did some work for me approx 10 years ago when I wanted a specific job done and were fine. No more recent experience of them.
There's also Coverdale near Bovey Tracey (Newton Abbot) but that's further away. Good reputation, but no personal knowledge.
I would agree with tonysmb, Steve at Mercare in Plymouth have completed several jobs on my car, more importantly they are an honest indie & won't rip you off by fitting parts that aren't required. 01752 226282