I have read the whole series of this manga thrice or more already (in assumption), but I have never experienced being bored by it.

The story is really great even if you reread it for how many times you want, the crispiness and beauty of the story is still there.

The characters are all fun (even each of their back story is quite amusing, it will really entertain you).

Overall, the impact is so great. Me---giving it full marks might be too much, but I just can't forget how great this manga is. It's cute, funny as hell, and at the same time the politics and historical aspects of war is present.