If you go with the idea that you are overpaying for the same hamburgers that you can get anywhere else in the 4 parks at a counter service but have a really cool atmosphere, you'll be ready and possibly even find that you like it. DW loves to go there but I cringe reading the menu. If it weren't for the 20% discount with the Tables in Wonderland card (God I hate that name) I would put my foot down and we would go to a counter service restaurant and eat the same burger and fries with different atmosphere and less hassle getting a ressie.
Don't get me wrong, it is a must try place to see how you like it and as you can see, many overlook things for the fun of it so you may be pleasantly surprised and come back and tell us all how much you loved it, everyone likes to hear a good trip report, especially from somewhere they had a bad/so so experience from.