Looking for that ultra ultra ultra high end gift? This is the place to get it at. Every store has a designer name like Mikimoto, Louis Vutton, and some I never even heard of. Very chic. The mall maps are presented by large computer touchscreens that make iPhones and Android devices look pathetic. The architecture is interesting although the mall doesn't flow on the second level due to the way the architecture crosses the walkway. Essentially, making you go all the way around to get to the other side.
One of many cool things is the whirlpool columns. They twist and turn, rise and fall to different colors and heights. It's pretty mesmerizing. Less, interactive is the ice column reflecting pool. They also had a Tesla exhibit. Being able to get right up close to one of these roadsters was very cool.
The tram station is located at the top, so keep taking those escalators until you can't take any more. You can take it to the Bellagio/Vdara and back to the Aria.
Currently, the mall is slightly empty. Not much of a surprise in a down economy for a mall with super high end retailers. Since the majority of it's visitors may not be able to actually purchase anything from here, it comes off as just an interesting place to visit.