We went over Christmas, I just wrote a big review of our experience at the Jungle Skipper Canteen on my blog if you want some more detailed thoughts about it (from my family at least!):
http://www.onceuponamickeybar.com/jungle-skipper-canteen/
Our conclusion: putting aside our disappointment with the food and the prices (because maybe they'll get more in line with time), you have a limited number of food options on your vacation and this just isn't worth the belly space lol!