Went there multiple times during our two most recent trips to Vegas. Great bar!
I am very sensitive to smoke but my husband loves to smoke cigars. The ventilation system is so great that I was able to sit next to him on a couch while he smoked two cigars and wasn't bothered at all.
The layout of the bar makes it great for any occasion. There were several couples having intimate drinks, business people meeting and a bachelorette party all at the same time and none were a bother to the others. The music level is just right as well.
Definitely a go-to spot for me on any trip to Vegas. Plus, the Aria pipes in good smelling air which I love.