It's great fun, definitely worth it. We did it in 2011 with our DS2 & DS7 and they both loved it. They want to do it again this year and who am I to argue.
Just been doing a load of ADR's this week for our trip this August and they both want to eat in the Castle. I've only done it once with my wife way back in the 90's so thought i'd price it up. $175 for breakfast in Cinderella castle for 2 adults and 2 children. £115 for breakfast!!!! errrrrmmmmmm.....
Dene