I'm sorry to say this, and I hope our experience was just a rare occurance. But dinner at MM w/ FDPkg was the WORST meal we had at Disney. The food was cold, and not very good at all. Yes, there is a special menu but we thought we found plenty for our family of 4. It just was really lacking. We were very disappointed and won't go back again. This was Dec 2005 btw so it's a recent disappointment.
As for H&V, we tried them last April....and hey, it's a buffet, but there were plenty of options to enjoy for all in our group. It's noisy...but the food was good.