We have always liked it. Some people find it (and most food at WDW) to be average at best, but for the most part we are not food junkies and don't go to a restaurant for the food itself, but for the total experience. Last time we went, it was one of the restaurants where DD3 ate the most. She got an "official" driver's license and a nice little ice cream sundae. Plus, like you said, it's always cool and dark in there, a plus when it's bright and 100 degrees outside.
Just bring a sweater and if you have a hard time reading the menus in the low light, you can always check out the menus ahead of time on the DIS. It doesn't change much.