I stayed at the Aria Wednesday through Sunday and got to play a decent amount in their poker room.  The staff is excellent and the room itself is great.  Very comfortable, lightning fast drink service and TVs to watch sports.  They have 2 daily tourneys (starting at 1 pm & 7 pm), each with a buy-in of $125.  They also allow you to buy in late, but no add-ons.  I think it's a great format and they give solid payouts.  Their tournament director Aaron couldn't have been any better.  The only problem is the lack of games.  They're always running small NL games like 3-5, but little else.....unless you're playing the $200-400 mixed game, which let's be honest - you aren't if you're reading this review.  I'll definitely be back to play in their tournaments.