Enjoyed it despite the lack of BL, it was a fun way to numb my mind. If you haven't read the manga and don't care about the lack of BL, it's still fun to watch.

The differences between the manga and the movie did put me off a bit though. Here's where I felt off-- the manga had its fun and adorable moments between Hiyakawa and Mikado, their relationship was intense but cute and funny, but the movie ver of them lacks the mix of those qualities. Even if they didn't want to make it a BL, they could've developed their relationship a bit more.
The ghosts were much more scary and creepy in the mangas, though I will not fault them for their CGI work. The sequence of Hiyakawa remembering his past was amazing, I loved it, it was very fun and a memorable part of the movie for me. I liked the art direction of it all
The sequence in the manga where Hiyakawa binds himself to Mikado forcefully is intense and low key scary, it was the most memorable part of the manga for me because it was like "Oh shit Hiyakawa is not as innocent as he seems" moment, but it was lacking in the movie-- I wish those elements were present. I wanted to feel that "oh shit" moment, if you know what I mean hahaha. The lack of the psychic character was also disappointing, but hopefully there's a sequel and they add him.
The manga has this found family element-- missing in this movie as well.. If there's a sequel, I would like to see that too.
I think an anime adaptation of this movie would have been better..

Anyway, comparisons to the manga aside, I truly did enjoy the movie. The actors did well in their roles and I enjoyed the music as well. The actor for the younger version of Hiyakawa was brilliant, truly memorable. I wish there was more of Erika Hiura!! She is such a complicated and brilliant character and I felt bad they hadn't shown more of her. The characters were a bit underdeveloped in terms of their relationship with each other and that made it a bit dull for me. The ending was pretty cool. I didn't really expect much from a 1h45min movie, and there were many questions left unanswered and unexplored, but I liked it anyway. I truly hope that this is just a movie to develop the bases and we get to see more. If not, it was fun in its own way.

I truly suggest anyone who watched this movie and are aching for more-- please DO read the manga. It's a brilliant work of art. The author herself reconfirmed on her twitter that Hiyakawa and Mikado are in love with each other.