Not sure why this buffet has such low stars. It's not fantastic but it is a good deal for your money, especially since the Luxor is mostly full of expensive eateries. (You can catch a tram over to Mandalay Bay, which has more restaurants and a food court. But meh, lazy.) They also have a deal running where you can eat at the Excalibur buffet as well as the Luxor one for a flat rate all day. If I had kids or was on vacation I would definitely take advantage of that deal.
Food is your typical hotel fare, which means a carving station and crab legs and a selection of different international cuisines. Nothing like the Wynn, but for $24 per person I was very satisfied. Not to mention very full.
They also have a full bar in the area, as well as a soft-serve ice cream machine and froyo machine. Bonus points!