Absolute masterpiece!

This anime was just incredible from beginning to end.
-2 seasons of 25 episodes was plentiful to develop affection for the main characters and set a meaningful plot.

- Every episode had purpose: Not too short (like those 12 episode series which never get a second season follow up because the producers are too rushed to meet deadlines) and not too long either
(like Naruto which is often delayed with needless fillers to buy time)

-It contained the right mixture of all the elements that make a successful story