This review is quite late.. very late actually, but I remember my experience quite well since it was the night that Aria was only open for special guests, mainly friends and family of hotel execs, so everything was free... when I say everything, I MEAN everything. Table games and restaurants included.
Now about the restaurant. Plainly put, you'd be better off elsewhere. There is no creativity within their dishes, and they add nothing new to Vietnamese and south Asian cuisine, even though they are classified as a Pan-asian restaurant.
The only thing I enjoyed was their Tom Yum soup, which was traditionally made with natural,coconut juice and a foot portion of shrimp.
Pho restaurants off strip are much more delicious, and much less pricier.