Joel Robuchon has high prices, smallish portions and some of the best food I have had anywhere. The service is always outstanding. I’ve been a few times and always done the tasting menu but they also have 3 or 4 course menus of bigger portions.
It is located in the MGM casino, along with L’Atelier de Joel Robuchon. The share a kitchen, L’Atelier is a little less structured, with a counter where you can watch food being prepared.
I also ate at Guy Savoir, Jaleo, Raku Japanese Grill and É by Jose Andre. All were excellent in their own ways. PM me if you want to know more.