yup , the best animation ever, good sound track, above avarage charecters and compelling romance is 5cm per second.
this movie has got the best animation i have ever seen, you will be literelly mesmerized by the animation of the movie
seiyuu is also excellent and sound track is good.
things might not appeal to few which are plot and characters. the chars are not very deep and plot leaves you with some unresolved questions.
the bottom line is 5cm per second is masterpiece of animation but the bittersweet ending may not appeal to some,anyhow it is for sure an eyecandy for everyone.