We stayed for 3 nights at Aria. Check in was quick. No lines like other places I've stayed on the strip. We were given a room on the first floor of rooms. It overlooked what I'm guessing was the casino roof. The sun reflected off the roof and cooked our room. We could not get the AC to cool down the room below 87 degrees and the windows were not floor to ceiling. All rooms are supposed to feature floor to ceiling windows. This is not true with these first floor rooms. The height of the windows didn't bother us much but I thought I would point that out. We called the front desk about the heat. They told us to come down to the front desk with our stuff and they gave us a new room. The staff was very helpful and quick with making this swap. This new room had AC and was much higher up and what seemed to be a quarter mile walk from the elevators (not uncommon in some of these places). The furnishings and bath were very nice. The tub being inside the shower was a little odd. And the windows were floor to ceiling. Bed was comfortable and everything was very clean.
We did not gamble much at Aria. We played some craps in the morning when the limits were low and some video roulette, which was fun.
We opted to eat most of our meals at the Cosmopolitan and Paris so I can't really comment on the dining at Aria. We seemed to like the Cosmo better in general. We spent a lot of time there and plan on staying there next trip. But Aria was still one of the nicer places we've stayed in Las Vegas.