The Laua was nice. The show was cute (little drawn out), with the highlight being the fire dancer. The food was mediocre at best, though the coconut head drink was awesome (though expensive)! The problem with the seating is on the dining plan you get stuck with seats that can be blocked by large poles.
Hoop Dee Doo is our favorite meal of the trip. We love the show, there really isn't a bad seat in the house, the food great, and you still get the added benefit of unlimited beer and sangria (our favorite feature). What is so nice is the show is good for kids and adults and it keeps you entertained through the whole meal. We didn't find that as much with the Luaua.
Glad we tried both, but HDDR will always be a part of our trips, unlike the Laua.