It's on Netflix, for those of you who haven't watched it and have Netflix~ Now my review:
I loved it!
Other than the fact that a certain someone didn't apologise to Meliodas after saying "We should keep him dead because he's apart of the Demon Clan EVEN THOUGH he died because he was protecting them!"
I didn't like him after that.
And the demons also died a little too fast. Ban, for instance, killed a demon after taking one heart. Demons have six, and as shown in the TV show, even with one taken away they don't die. They can live without one of them.
BUT! Everything else about the movie is GREAT and I loved every other little bit!