My sisters love this! For about 3 months straight, they watched it twice a week at least(we're the type of family that watches a good movie over and over again).
The only thing that might be slightly off-putting(for ours it wasn't, I actually was very surprised, our family is no-no about this sort of thing), is that they show puppies and kittens being born, like they actually show them coming out and such. I suppose since it was kitties it was fine.
But they show that friendship is very important, and not unrealistically(Milo and Otis don't always get along with everything, but they don't let that control their relationship).
A man narrates the movie, and does the animal voices(there are no humans in this), and I don't know how, but he makes it so interesting, and his voice is old mannish and friendly.
Also, Milo and Otis get 'married'(hence the puppies and kittens), but even though they have romantic partners they still are friends. I thought this was good because today's mindset is sort of 'romantic partner over all'. Yes, that's true, but you still need friends. And you need to instill these things in them young........ anyway, all of their friends love it, and they do as well. I'd say movie night for ages 1-7.