IMHO the sit down food is not wonderful. Take advantage of the pre-show food (I think it was better!). Get there early to take full advantage of the pre-show & snacks.
If you have a young one - make sure you buy them a seat or they don't get any food in the show. We found this out with our 2yo - I had to share my meal with her (and there is not a lot of it!)
If you throw yourself into the show, participate, cheer, boo etc, I think it is enjoyable (but not WOW). Our kids enjoyed it DS6 and DD 2. From that perspective I think it might be better to upgrade to be able to participate.
--Kay