As a born and raised Kamen Rider fan and a Cinema lover, the movie was Ok. It was just a edgy retelling of Kamen Rider. The story is very different from the original 1971, the camera work was just bad, choreography was poor, the pacing and scene cuts of the editing team was definitely not thought out well. CIG was good at certain parts the only real saving grace was probably the costume team.
I would rather fans just watch the original 1971 because the why it was filmed had more character to it. The choreography and cinematography was much better and you can tell Shotaro Ishinomori really thought things through when filming.