Recently relocated to Vegas though we have dined here in the past as tourists. Decided to experience Carnival Buffet again for Sunday night dinner as they were offering 50% discount for locals. They don't do this anymore, only 25% so not only is the quality subpar but it is overpriced. Got there shortly before 4pm so there was no line but caution: if you arrive prime time the lines get longer! Atmosphere & layout is good but rate it 2 stars because if you were paying full price $29.99 per person with players card it is not a good value compared to other Vegas buffets. Negatives: if you like crab (we do!) Carnival's are the snow crab which is obviously the cheapest & smallest they can procure, a bit salty, & lacks meat & sweet taste. My spouse commented the salmon he had was dry and tough. Salad bar is OK but no Caesar blend & nothing special. Selections are varied but nothing really stands out. Some other buffets in Vegas similarly or much lower priced offer much bigger better crab & unlimited beer or wine but at Carnival you have to pay significantly extra for wine, etc. Positives are: pleasant staff, good Prime Rib & shrimp dim sum, gellato is good. Best can give Carnival Buffet at Rio right now is just a half hearted recommendation.