We did fp+ and totally on the fence. Seats weren't bad, sat in the Malificent section about midway. Arrived at 5:30 and were allowed in to find a seat. The best seats are definitely reserved for the Fantasmic Dining Packages.
Overall, it wasn't bad, but the dining options with the Fantasmic Packages aren't all that great either, IMHO.
Still got to sit in the theater and watch the show, so that was a plus. Didn't feel so crowded, plenty of room in our area even though the venue was packed. But, with smaller children waiting an hour for it to begin, even with the cute little preshow thing, was a lot to ask of them.
Kelly