I really loved this movie.
As mentioned in other reviews, the story is fairly easy to follow but still interesting, aided by great character development and beautiful art design and animation.
There were some pretty emotional moments, some deeper, more nuanced, and there were a lot of interesting side characters.
As a movie, I think it sits square in the middle between Miyazaki, with strong female leads, and Shinkai, with an emotional, well constructed story.
The ending left me feeling satisfied, and there were a couple neat, little twists as the plot unfolded. I thoroughly enjoyed this movie, giving it full satisfaction scores :)
As an aside, I am not a cat person, but I think the movie did justice to our feline friends, both in terms of visuals and story relevance.