Vdara is a beautiful hotel to stay at and a great place to really get some rest after a night out because there is no casino within the building so it stays really quiet. They also pass out water bottles during the early morning hours for all you dehydrated party-goers. It's right next door to City Center / Aria and is convenient if you're trying to play at Haze. It is also within walking distance to PH Earl of Sandwich which is a big plus in my book.
The pool is very low-key which I don't recommend going to unless you're actively trying to avoid the pool party scene. Oh they also have free wi-fi and a kitchen. Valet only. Don't forget to check out the beautiful Frank Stella painting behind the front desk and contemporary floral arrangements.
I also must say their hotel security is very helpful when trying to find your friend in Hangover-esque situations. Don't be deterred by the middle aged woman with claw clip pigtails...she'll do the damn thing and find your lost friend before check-out time.