The music generated a good set piece to accommodate the scenery, the story was good, the actors and actresses knew what they were doing and why, but the pacing was too slow.
I don't know if it was going for a, "Laurence of Arabia", or "Lord of The Rings" style story, that needs three hours to tell, but it really didn't. It was three hours of character introduction and development. Good character introduction and development, but still.
Imagine if "A New Hope" and half of "The Empire Strikes Back" just followed Luke, Han, Ben, and jabba around tatooine, before the events of the first film, and promised us and our parents that the story gets good as you go...
The last five to ten minutes of the film showed a fast forward view of what I hope is a "next time on dragon Ball z" and not, "when you come back, the movie you though you were watching will have happened"
I'll sit around the house and watch 8 hours of anime....while I do laundry, work out, wash dishes, sweep and mop.... You can't lock me in a box with 1hundred strangers for three hours and expect me to sit still.
It's a good movie, that I would rather watch at home so I can be doing something during the bits that lose my attention; they weren't long runs of boredom, just frequent enough that that I would rather have been somewhere else.