With two kids the ages of your children, yep, I would definitely do it. It's a fun and very enjoyable show. The food is only fair to poor, IMO, but the show is great and it's a fun evening. They will bring mac and cheese that most kids will eat. As for the fried chicken and ribs, let's just say the cornbread is good.
Kids of all ages enjoy the show. My 75-year-old mom loved it, and my 18-year-old nephew was picked to be in the show. We had a great time.
If it were just your dh and you, I'd say spend the 2TS on Jiko. Dh and I, on an adult trip, would never book HDDR. But kids will enjoy HDDR far more than another long dinner!