We were always pleased with our meal, and the service is impeccable. Many of the star-chef restaurants in Vegas are not up to par, but since Rick Moonen is actually present in his restaurant, the standards are top notch.
We have eaten both upstairs and downstairs. I love the tasting menus in the more formal upstairs. If you love seafood it is a great experience. My hubby likes the more informal downstairs and eating a couple orders of the oyster sampler and a beer. The option of more formal or casual is nice since sometimes you just want a casual dinner and other times it's nice to splurge.
We've had the chance to chat with Rick a couple of times on our visits, and he and the staff always make sure our dining experience is special.
We always stay at Mandalay when we are in Vegas so RM has become one of our favorites.