The boys really enjoyed it. Rowen kept giggling whenever Sloth said or did something funny. Connor seemed to be impressed with Data's inventions, but ironically didn't like Mouth.
There are certainly parts of the movie that have not aged well, but I think that it still stands as a classic in my view. I've heard that they want to make a sequel, but I don't know if I want one. The story felt (and feels) complete to me as is.
I will say that it was strange seeing Samwise Gamgee and Thanos/Cable as brothers.