So far have not had problems with rsc in Malaysia, Taiwan and Japan. I guess as long as they are listed as a rsc (official), there should not be any issues. If got problem, complain. So far I have sent my rolex and Tudor to rsc in Malaysia and have no issues. Same with my friends.
Trust me, I have had worst experience in other brand service center. In one particular brand, they scratch the dial and I had to show proof that I did not do it. I mean really?