Having stayed at many Strip hotels I can say that ARIA is still one of my favorites.
Love the luxury feel, the attention to detail, the large and clean rooms, and the pool area. The staff has been wonderful every time I've been there. There are special perks if you stay in one of the Tower Suites, like airport transport, having access to a lounge, or extended checkout for free (if available).
If you're looking for an elevated Vegas experience and want to avoid the crowds you might know from Ceasar's, Paris, and the like - ARIA is the sh!t.