The trailer almost made this movie seem as if it was a journey to find Arrietty's mother when it's really not, so I had some false expectations going into it, but once I got over that, I fell in love with this movie.
The story is rather simple, but that's not always a bad thing, and it allowed for more focus to be placed on the characters and the world around them. I fell in love with the two main characters right away, and enjoyed being able to see the world through their eyes.
And the world... Wow! They did such an amazing job at making everday normal objects look so beautiful and interesting, really showing us how the Borrowers see the world around us. The attention to sounds was excellent as well, with more emphaiss on in it when the Borrowers were around.
Overall, simple story, but the characters will stick with me, and it's one that I want to watch over and over again.