Pros - Considering it was made in 1985, it is outstanding for the time. A lot of intricate themes and ideas such as adulthood and death that was not normal in anime. This is 2years before Devilman's OVA and watching these dark themes in theatre must've been amazing.
Cons - Today, this movie does not stand out although the animation is still nostalgic and amazing. This OVA is more of a trip than an actual anime. This movie touches upon religion. There is about less than 50 lines in the whole movie. A lot of silence and drawn-out scenes, It is why I recommend to speed it up just a bit than normal. There was 1 single scene that took 3 minutes long. speeding in it makes it 1.25x makes it seem more normal than it should and for its 50 lines and giant landscape and simple theme, I think its worth it.
