Okay, so I finally watched this last night.
Before watching: I had ridiculously high expectations. I try not to do this when opting to watch a film or series because then I always find that at some point, it does not meet up. However, I heard so many people compare this to Kimi no Na wa, saying that it was actually a better film overall by comparison. I loved Kimi no Na wa. So. Since so many people said it was better, of course I was itching to watch it. I also found that the plot/concept was really sweet. I figured it would be one of those bittersweet films I love, much like 5 cm per second, which is on my top favorites as far as animated films.
After watching: I found that I did like this film a lot, HOWEVER, I would not go as far as to say that I liked to more than Kimi no Na wa. I find that film to be far superior to this one. I felt like this film left out quite a bit in regards to story development. I have read that the people who read the manga first, also found slight disappointment for similar reasons. Granted, this often times happens when animated adaptations of manga becase you can't necessarily fit every single thing into a film. But I felt like there were some parts that skipped around a bit. And this was a bit disappointing to me. Still, I found the film to have a very deep and beautiful meaning. It was also very relateable to me personally, and there were a few moments where I actually cried a bit. I absolutely love Shoya's character as I found him the most relateable to me. I think his development would have been better emphasized on in the film. The animation was beautiful. I liked the soundtrack.
Overall, I'd give it a solid 7.5/10.