My friends and I had reservations at Todd English's OLiVES. Located in the Bellagio, it was really nice to walk through such a famous casino and dine in style. I also liked that their drink menu was on an iPad so you could pick a fancy drink!
I had the Ricotta Ravioli, and it was delicious! Very good, and the menu had a ton of other options. The portion sizes weren't too much, and everything tasted really fresh. In addition, there were definitely affordable options like flatbreads that made this a very accessible restaurant for such a fancy location and offering.
I would definitely eat there again, if only to try to get seating on the coveted patio overlooking the Bellagio's famous water fountain show.