On a visit from San Francisco we went to Beso since it was close to the Cosmopolitan Hotel and open late. The atmosphere was really nice and everything on the menu we tried had fabulous and clean flavors; although we didn't try the steak! The tuna tartar, scallops, soup, salads were all very flavorful.
I also have to say the service was more than I expected from a LV restaurant.
Wines are overpriced however the cocktails are great.
I would go back on my next visit.