We did the Fantasmic Package @ Hollywood & Vine

. Can't help you out with the BD aspect

, never been there. Used
DDP, so the Fantasmic thing was just a freebie .
The reserved seating area was nice

. We liked having no line and our own special entrance for Fantasmic. I've heard stories about how long the line can be. One of my friends said that she had to start waiting 45 min before the "gates" opened, just for a decent seat

(or ANY seat).
The meal itself wasn't any different than a non-Fantasmic meal. They just give you a receipt, as proof that you can get through the "secret"

entrance & sit in the reserved seating.
If you had already planned on eating at the BD, then I'd go for it. Anytime I can delete a line & save time, I'm up on it.