I have problem with RM 014 two weeks after purchase (It just stays dead, even after fully wound). RM take a look at the watch and decided to send a new replacement - top notch service.
I have another problem with RM 11 (chrono start stop problem), decided to bear with it and send back for repair after about 6 months wearing it, Come back almost 6 months later, all fixed and look like new!
My wife rm 7 been back at least 3 times, running very fast, the last time stay there for 4 months, problem seem to be fixed now.
RM 28, found out that it won't auto-wind (fiine when wound manually), back to RM after 2 weeks, haven't seen it ever since (a month?). Need to send it back to factory, no tools to open the watch locally...
RM 10 - no problem so far (a couple of years)
Rm 5 - dead after 4 years, regular service ( a few months) and come back like new.
So far 4 out of 6 have some kind of problem, not great record for QA. Will I get another RM? Yes, given the chance, just can't resist them 8-)