If you like sea food Inventions is a good one, although personally I'd go at lunch rather than in the evening - there's a considerable price difference between the two sitting and as far as I can tell the only difference between them is that lunch doesn't have characters.
We've had mixed experiences at Walts - both times the food was excellent but the service the second time was appalling, very slow and it really isn't a very child friendly place (oh and hubby got food poisoning from the crab which really put me off)
There's been a lot of bad reviews of Cafe Mickey recently but when we went last November it was awesome, lots of characters and interaction. If you've got a little one then it's a must but it can get very hectic and tbh I don't like we got our moneys worth as DS was too distracted by the characters to eat!