If you want to know the strength of a buffet, go during dinner because that's where they pull all their guns out. We got comped so it was a no-brainer what meal to use it on.
I'll say outside of maybe the prime rib and crab legs, it was a really an average spread. Even the dessert bar wasn't anything to get excited about. They had the usual suspects: pizza, mac n cheese, Chinese food, sushi, etc. but I had a hard time figuring out what to get because I don't like to waste my appetite of fillers like carbs.
At $30 a pop it isn't outrageous, but it could be better. Our server also was just ok so that's adds to the experience too. Considering the ton of restaurants inside the resort, I kind of expect the buffet to step it up. MGM isn't known for their buffet and now I know why.