It's a "been there, done that" for us and if I don't return anytime soon (or later), I won't be sorry. It definitely is not a must do for our family.
I thought it was overpriced for what "food" we received, we got poor service and the show was as someone's hubby stated, pretty Hokey!
I felt like our server neglected us during most of the meal -- because afterall, gratuity is included, and then they were in such a hurry for us to leave to they could set up for the next group that I felt like we just warmed up the seats for the next group.
Honestly, it is something you'll need to decide for yourself -- you know your own family best. But if it's a cost-factor, then don't stress over missing the show. It's been there for years, it'll probably be there for many years more.
Good luck with your decision whatever it may be.