Sometimes average movies (like "Finding Dory") get top rating, while a good movie (like Emoji) get low rating. May be the reason lies in how it is projected, or may be it's a joint witch burning event (if one person/reviewer gives a thumbs down, rest keep following that).
Anyways, Emoji has all the necessary contents of a good movie: new concepts (Emoji pop dance), humor, interesting story, and accurate presentation.
Cheers.
Review of The Emoji Movie
