This buffet has been vastly improved over its predecessor. The food selection is much more expansive, the pricing - fairly reasonable, and the layout, no longer a cluster#4k (although some sections still have retarded elevation changes). I recently tried the weekend brunch buffet for about $30 per person. They've decoupled the price of food and alcohol to make the buffet seem more economically priced compared to other high end buffets like Bacchanal over at Caesars. I'd still say that Caesar's buffet is still the better of the two, but Aria's at least will not leave you disappointed. There's some standout food items like the dim sum tray and the indian food selection. One sore spot for the buffet would be the lack of fruit choices for brunch- watermelon, cantaloupe, and honeydew shouldn't be the only fruit choices at a high end buffet.
If you have an Mlife players club card (Pearl and above) you can utilize the buffet line pass. Overall, a nice option, if you are trapped within City Center.