We hit
Aria and Bellago regularly with myvegas, we've enjoyed both. We don't go crazy for them like we do with Wicked Spoon (Cosmo), but they've always been solid.
People may throw peanuts at me for this, as I've read other's that like it, but the buffet that shocked us was MGM over lunch. It was awful, izzys awful. Maybe it was a bad day, but the roast beef was dry and overcooked (brown, not even pink), the pasta was spongy where you cook it way too long, and everything tasted procesed and flat yucky. I expect any buffet to have some good dishes and some not so good, but there literally was not one dish we enjoyed. Maybe the cook was quitting that day and it was his revenge to MGM!

Ok, sorry for MGM rant, but I'm still mad about that meal, and I'm pretty low maintenance.
If you're on a budget, I'd suggest do a nicer buffet over lunch than a lesser buffet over dinner. The price will be about the same, but the quality way better!