Lemongrass has beautiful decor and is nicely situated amidst the Aria Hotel directly near the Sky Suites entrance. The restaurant is actually tastefully done with a central bar and plenty of tables. The food itself is nothing short of average, it isn't terrible but it is by no means terrific. The Satay is essentially the best thing on the menu and you have your choice of meat, I've had the lobster and the beef, both were pretty good. The Phad See Ew with pork wasn't anything to write home about and the overall portion/presentation is simply just average as well. I will say that the Thai ice tea is pretty tasty... The servers were stretched a bit too thin which ultimately resulted in subpar service. Overall, this place is nothing spectacular but if you're wanting late night Thai and want to stay in the vicinity of Cosmo and Aria, then give it a shot.
Pros-
Nice ambiance
Location
Decor
Thai ice tea
Satay
Cons-
Food was average
Service was meh
Portions a bit small
Pricey for what you get