[Note: review is solely for the lunch buffet]
Lotus of Siam has the best lunch buffet in Vegas, hands down. Not because the buffet specials change daily (although tasty variety is nice); not because the ginger tofu dish is tart and spicy in a way that you know they are using fresh ginger; not because the fried sweet potato curry puffs have made me ditch my diet more than once (although, I could honestly pig out on a plate full of those things--crunchy and sweet with a dash of spice . . . mmmmmmm).
No, it's because each dish under the heat lamp is fresh. In contrast to most of the buffets in Vegas, Lotus of Siam does not leave their buffet dishes under heat lamps for hours. Each dish is fresh. Hell, there's not much chance for the dishes to sit for long since the place is always packed for lunch and the kitchen needs to keep cranking out food to refill the buffet options.
Oh, and the buffet dishes are properly cooked. An overcooked chicken can ruin a Pad Thai, but you won't find that here. It's tender, it's seasoned and it's wonderful.
And they do a good job of catering to the full spectrum of spice lovers. The dishes on the buffet aren't overly spicy, but there's plenty of hot sauce and dried hot pepper to stir in if you want to raise the heat level.
All around thumbs up.