We stayed at Vdara and were looking for a good, close-by place for brunch/lunch after a long night out. This place was PERFECT -- exactly what we were looking for. If you can stand to wait in the line (there was actually two, one line to pay (~$30 per person) and one line to get a table), it is totally worth it. The best buffet we had on the strip with delicious food.
Most buffets just seem to throw a little of everything out and only make it mediocre, this place is totally different as everything comes in personal portions made in front of you. We caught the tail end of breakfast as the food was transitioning into lunch (the way to do it, in my opinion!) so we got to try everything!
Lastly, the dessert bar is just amazing. Try and save some room for it, but it will be hard!
Tip: If you're coming from Vdara/Aria/Citycenter, this place can be a little hard to navigate to. Walk outside, and down to the street level side of The Cosmopolitan under the tram and go in the side entrance where the limos arrive. Then follow signs up to the upper floors and Wicked Spoon.