Seating is limited for this, so if you plan on doing it I would call ASAP for your PS. That said, my DW and I did it and enjoyed it immensely. The ice cream sundaes were good and we had some great character interaction. It seems sort of expensive to some, but what at Disney is inexpensive?
It's a terrific way to take an afternoon break at Epcot, meet Mickey, Pluto, Chip 'n Dale. I'd go for it. It'd make a great memory for you and your family.