As is the case with a lot of the character buffets, the food tends to be hit and miss. Some nights it's really great and some nights it's just not, as you can tell from the wide range of responses here. Two things I've found to be incredibly consistent about 1900 Park Fare:
1 - by far the best character experience of any character meal. The characters really take their time with each diner, and go out of their way to make you feel like you're getting your money's worth, regardless of if you like the food or not. Last time I was there, Lady Tremaine actually sat down at my table and we had an entire conversation during which she tried to vet my worthiness to marry one of her daughters (as it turns out, I needed to own three castles to live up to her standards).
2 - no matter the quality level of the adult buffet choices, the kids section is always in the "pretty good" range. Sure, it can seem a bit silly getting chicken nuggets and mac & cheese when you've paid so much for dinner, but if the chicken is dry, or the mashed potatoes are too lumpy, or the peel-n-eat shrimp look like something that came from the 23rd hour of a 24-hour Las Vegas buffet, you can always fall back on those kids options (one of which at 1900 Park Fare is a taco bar, which just seems mean to limit to "kids").