I watched this movie in theatres, and for a first time watching anime in theatres, I found it quite pleasant. However, I will say that my score of 7/10 comes most likely due to how Rimuru and Diablo-deprived I've become, so I was content just being able to see new content. Realistically, the movie is a 6. The action was a bit lacking imo, the events are SUPER plot convinient, and I feel overall although I welcome it, this movie was completely unnecessary. I believe you have to be a Tensura fan to enjoy this. Even then, it's still nothing exceptional. Overall though, I did verymuch enjoy it and don't have many complaints.