Back in the days when I did run newish cars and used them for servicing , I never had any problems and did on occasion get courtesy cars (usually VW beetles in those days).
Parts staff were spot on and a mine of knowledge , able to quote part no's without recourse to microfische or computers , sadly all have moved on apart , I believe , from Ellen Forgrave who was still there last time I visited .
How many dealers , when you order a new starter ring gear , will tell you to bring in your flywheel then heat & shrink fit it FOC while you wait ?