The excellent and impeccable animation isn’t enough to make this movie worth watching. The story is bad, the soundtrack is generic, the voice acting is decent but lacking sometimes and it goes really fast and leaves zero space for any character development. There are some attempts at this, but they are really forced and badly executed.
This is one of those movies that serve as child distractors while mommy and daddy are working. Kids won’t learn anything special and neither will adults. It’s just mindless entertainment that capitalizes on the nostalgia factor of old Hanna-Barbera properties so that adults who don't want to let go of the past blindly believe it is a good movie.