I got married last Oct 2012 and I used Neysa Berman for hair and makeup. I highly recommend her and her staff. She was really great and very professional. Her staff were simply lovely, we had a great time with them. And their work is perfection.
I didn't want to use the Riu's makeup services because I didn't find good reviews about them. So I stretched the budget a bit for the makeup and I'm so glad I did. She was worth the $$. You don't want to look back at your wedding photos and have regrets.
By the way we went to a nearby spa (which was SO FANTASTIC) to get the services. The Riu charges $300 for any outside vendor to come to their property. Just ridiculous
Good luck on your wedding planning!