It was a one and done for us locals. We took my nephew who was 12 at the time and he was a bit old for the party. The kids that really seemed to like this even were around 5-ish. The characters do not come to you. You must get up and interact with them so if your kids are shy, it may not be the best thing in the world. The food is Trails End all the way (which was fine with us) and the entertainment was ok too.
It's very loud so be prepared for that.
If you are doing this in July, be prepared for it to be blistering hot & humid. It's out in the open under a pavillion which could mean afternoon T-storms at the dinner hour for the event. Standing in line to get in could be an issue here. We did it in August and it was sticky. We live here though so we are a bit use to it.
If AC is a requirement, this isn't for you.
If Mikey & Minnie and Goofy are your goal, there are other indoor places you can get with them for less or about the same $$. (Cape May Breakfast was one of the best for Minnie & Goofy IMO) If Chip & Dale are who you are after, there is a sing a long campfire program that is free at Fort Wilderness nightly or Garden Grill would be better for indoor experience.