As an Aria fan I'm slightly biased. I stayed at Vdara for the first time, but in comparison to the sister property Aria, Vdara is only second choice.
+
smoke free property
sleek elevators
Starbucks onsite
location - next to Aria and Cosmo
-
no casino
mattress comfortable but no variety in pillows
no extra amenities like slippers, or toiletries
overpriced mini bar
If you're okay with all of the above, by all means, go for it; Vdara has some decent promotions out every once in a while.