I eat at one of several buffets in the Baltimore area about once a week; either Golden Corale, Cactus Willies, Old Country Buffet, or smaller non-chain Chinese buffets with names like Best Buffet. All of them are between $9 and $12, and the quality of the food ranges from average to pretty good.
My experience with the Disney buffets has been that mostly the food is a little better than the places at home, but not so much better that the food alone would be worth twice as much. And there are some exceptions:
Lunch at Biergarten was not bad but no better than I could have gotten at one of the buffets at home.
Dinner at Crystal Palace was chaos; the character interaction was the best, but the food was mediocre at best, and the buffet looked like a war zone. I was hesitant to put some of that stuff on my plate because the parents were letting 5-year olds go to the buffet unescorted and playing in the food like Richard Dreyfus in Close Encounters (This means something... this is important!)
Lunch at Trail's End was excellent; simple food, not a lot of selections at lunch, but very well-prepared and the buffet was clean and neat.
Boma and Chef Mickeys were both excellent the last couple of times I ate there. Although Chef Mickey's buffet did need a little attention, it was't a DMZ like CP.
I haven't eaten at Akershaus in a while (and won't now that it's all-princess, all the time), but I never saw that buffet in less than absolutely perfect pristine condition and full of the freshest, tastiest food. It was, hands-down, the very best buffet I've ever been to, I tell ya WHUT.