I have never seen such a clean animation movie, the drawing and animation is just breathtaking !
I didn't really know what to wait from this film, as I just had this film in my list and I didn't know Shinkai. I saw Kimi no na wa a couple of days before and realised I had this film from him in my list, so decided to give it a go. I'm not such a fan of romances, but I have to admit I really enjoyed it !
the background of each character is shown piece by piece throughout the film, slowly revealing them, with numerous (maybe too much ?) shots showing the city or the scenery to keep the pace slow but steady.
the music is quite good, with sang parts and instrumentals, I must say I was fond of the atmosphere.
I was surprised by the length, but I have to admit that it prevents the film from being sluggish and boring.

Clearly, I'm rating this a 9 for the drawing style and the atmosphere, while I would rate the overall story a 7-8, great work !