We ate here the last evening we stayed at Circus, Circus. It wasn't horrible. We just walked in, no line. The drink and dessert lanes were nice. Salad bar was basic but fresh tasting.
They had several different set ups-a fried chicken and fixings, a turkey and fixings, one kids foods-pizza type stuff, a carving station with roast beef, turkey and pork roast I think, a fish/seafood section nothing to get too excited about, and a taco area.
We ate here the night after a rather disappointing dinner at the Garden Grill. The buffet was actually an improvement.
If you are staying in the hotel, too tired after a long day of walking and if there isn't a long line it's ok. It wouldn't be that great if you had to wait in line. And definately wouldn't make a special trip to visit.