I saw this movie at a midnight premiere.
The Super Mario Bros Movie is an adorable upbeat adventure with a lot of callbacks to past titles. The voice actors were all able to breathe new life into these iconic characters without completely changing our perception of them. Action sequences are enjoyable and at times absolutely epic.
As for downsides, the movie suffers from pacing issues, lack of character depth, and a good amount of jokes that don't land.
Overall it wasn't the masterpiece we wanted, but it still is an enjoyable hour and a half that most audiences are likely to enjoy.