We had an 8-person family dinner here early on a Saturday evening. They were very accommodating of all our requests, and the service was excellent overall. Our water glasses were constantly being refilled. The restaurant is beautiful (and quite large), and it's really quiet, even when the place got packed later during the evening. I would highly suggest this restaurant for large groups.
Now onto the food! Their bacon cheese bread to start is quite tasty. I ordered the tasting menu, and it was soo yummy and relatively affordable, and tons of food! A few standout dishes were my rabbit wrapped in bacon served with a sweet potato (?) ravioli. The combination of salty, smoky, and sweet flavors was amazing! Also, the chocolate peanut butter dessert the server suggested had amazing texture and crunch. Served with a raspberry sauce filled dark chocolate. So yum!
The only criticism I have is probably that the Aria is not my favorite hotel in Vegas...something about the decor/ambiance is just kind of "off". But 5 stars for Sage anyway, check them out!