I was there couple weeks ago. There was "invited guests" check-in line that you can use. Or at least I used it as a diamond

Ok hotel but looks and feels like condo apartment building and pretty small hotel for a Vegas standards. Not bad place to stay by room or location wise. Pool was smallish but i managed to find seats easily.

After stays in Aria, Vdara, Bellagio, Caesars, Luxor and visited almost every hotel in the strip I would say Aria would be the place to be in Vegas.