Most of the restaurants I've chosen in Vegas I've been happy with but Lemongrass not so much. Overall, the Aria is a slightly strange place. The rooms are amazing - so comfortable, amazing touch screen technology to control everything in the room, bathtub in the shower area, etc. That said, the hotel lobby is gloomy, the casino is very dark, the club is just okay, and the casino tables are not lucky!
Back to Lemongrass though. It's thai-fusion and not all I'd hoped for especially with how much I love thai food. I'd be happier with more "normal" thai food than this spot. We tried to get the seaweed salad to start but had to send it back because it was so strange and fishy. The other dishes were not memorable either and it wasn't inexpensive. We had wine which was pretty good but the food was just not worth it. If I were to stay at the Aria again, I'd choose other restaurants for sure. I'm actually a bit surprised that Lemongrass is still there.