If you haven't watched the series or read the manga you'll be confused. I kind of admired the attempt to reduce a whole manga and a whole 76 episodes into 2 hours, but I just admire that. There were times that I had to pause to analyze what was going on, they talked about things that did not happen before. I thought they were knowing each other for some weeks and suddenly I realized 6 months had already passed. Then they are grown-up persons going to college, who knows how Meiko started living with Namura, if you know nothing about the background you'll be REALLY lost as this point. Maybe the best part was the confrontation at the end, a bit over-acted, but it was good. The music was okay, at least they could have covered some of the original songs from the anime, but it's understandable, maybe it was cheaper having a band playing some forgettable songs. I don't think it was that bad, maybe it could have been better if it weren't so long, if you're gonna chop a long ass story, at least chop it well.
Review of Marmalade Boy
