Just back from 10 nights in Vegas (3 at Caesar's spa tower, 3 at cosmo, 2 at PH, 2 at Aria)...38th trip to Vegas....stayed in almost every hotel on strip.
Loved Aria...very big open and chic. The rooms are very nice and beds are amazing....but the room is a little small. After staying at Cosmo it is hard to compare (Cosmo is awesome with the terrace and size).
We had a great time at Aria though...lots of great slots and good table limits. The Deuce lounge has an awesome after dinner "carrot cake" martini. We also sat in the lobby lounge and had some very strong ginger martinis. Loved the tapas restaurant.
Of the 10 nights in Vegas I only ran across a few "not so friendly" employees (So many great employees everywhere) and those not so friendly ones were here at Aria (front desk, pit boss, a dealer). But with that said Lesley the casino host was awesome, Urliss (spelling issue) the Pai Gow dealer was so great, and Nicole the waitress in the Deuce were all so great.
We would definately stay here again, but if it was between here and Cosmo for same price..Cosmo hands down because of the terrace.