I have done Hoop-Dee-Doo every trip since our first trip in 2000. (5 times)
I have been with only adults (Loved it)
3 Adults , 2 Teenagers (All Loved it)
2 Adults , and 9yo Son (Loved it)
The show is a little hokey and "Cheesy" which to me is part of the appeal. The only draw back might be is that the performers do at times draw attention to certain members of the audience. (The antics are all in good fun) If you are on the shy side, you might not enjoy the audience participation and interaction with the performers.
I and EVERYONE I have been with have all loved the food. The presentation is very unique and fun and it's all-you-can-eat with something to satisfy anyone's taste. (including picky eaters). The price is a little on the too-pricey side, and some would argue that it's the type of thing you would only want to do once which I would agree with unless you go with different people every trip such as me.
I HIGHLY reccommend it, and it has always been one of the highlights and most talked about moment in every trip.