The "2nd" chapter almost completely ruins the movie (slight spoiler)
I understand why it was like that, but went on far too long, and the Justin Long character was too 'comedic'.
I was just about to give up in the movie until the "3rd chapter" set in the 80s pulled me back in.
Then the rest of the movie was okay I guess, still a bit dumb still in parts, and I think it has been overhyped for sure...but the music at the end was a nice touch.
It's a 6/10 for me