Ok - I have no bone to pick with this hotel. The rooms are very modern and well-equipped. Beds = amazing. The hotel itself is very clean and is scented with something yummy. But to be honest, I don't think I'd choose to stay here again.
It's very open, almost TOO open where it feels more like a convention center than a hotel. It's also missing the typical "vegas effect" - there's no theme, no wow factor, even the casino is kind of forgettable.
If you're looking for a hotel with nice rooms that's easily accessible to leave and hit up the rest of the strip, Aria is great. Personally, I'd go for Wynn, Palazzo, or The Cosmo if you're gonna pay the premium anyway.