I went to see the movie, and I thought it was great! There was a nice blend of humor and serious, and the visuals were amazing. The ninja and their mechs were especially dynamic.
And I loved what they did with the story, especially with the Garmadons' relationship, I think it was quite touching for a kids' film.
"Your Mom wanted the best out of me, and the best for you."
I think the main problem was some, at times, odd pacing, with it being a little fast for my liking. And the other 5 ninja, that weren't Lloyd, didn't have as much characterization as I would've liked.