The Las Vegas buffet is one of the great food customs while visiting the city of sin. There is much debate regarding the best buffet in town. The best (and most expensive) is Sterling Brunch at Bally's which is known for oysters, lobster, champagne. Unfortunately it is Sunday brunch only, meaning you have to time it well.
Of the rest, the Bellagio and Wynn are widely regarded to be the pick of the lot. We chose the Bellagio mainly because we stayed there (as the rooms are much cheaper) meaning express entry into the restaurant. And on a Saturday night, this easily saved us more than 30min of queuing time.
The food selection is very broad, so ensures the ability to cater for whatever whims you and your group have both in life and specifically that evening. The quality itself however is average.
The best of the lot is the seafood - good sushi and sashimi, prawns, mussels, crab legs. The less good news is the meat - excellent selection and all cooked to a nice medium rare, but the quality was lacking meaning it was all quite tough to chew through.
Next time I would only eat here if I was staying at the hotel with a group of people each wanting something different to eat. Otherwise I would eat at any of the many quality Vegas restaurants for the same amount of money, some of which are on this blog!