My DS probably loved these characters more than any other characters we saw on the trip. He had a great time. The food is good, pretty much standard buffet fare, but something for everybody. The characters made their way around several times before we left and we weren't even there for an hour. Our ressie was for right around 9am.
My DS is a fan of Jojo but he loved June and Leo even more and he doesn't really know them.
Good luck!