We come here with some degree of regularity.
The view from the 50th floor of the Rio is INCREDIBLE! The restaurant is quite pricey, and everything is ala carte, but it's all good and very nicely prepared. The service is good, tho we went early before the crowds arrived. We have tried numerous dishes and were always pleased. I usually have Salmon and find their's quite good. Their lamb was also quite good with generous serving sizes.
Bring your camera and join the crowds taking photos of their group overlooking Las Vegas; it's quite impressive!