Beautiful hotel, very clean and nice rooms, and everything else you'd expect from a glitzy hotel like Aria. Front desk is friendly and quick, a pretty rare thing at big hotels. I really love the awesome curtain alarm where you can set your curtains to open at a certain time and whatnot. Essentially makes the room into your alarm clock.
The one thing I'd have to complain about is the really strong perfume whiff that you get when walking on the casino floor. It smells like vanilla perfume that a stripper named candy or star would wear.