Watch any of the Star Wars' movies, you might want to do so because of the reference to the past characters in this movie might confuse you or you might not get as excited as you should. I think this the only Star Wars movie that is not as heavy and kind of family friendly.
So the movie is about where Han came from and how he got his name and where he got his Millennium Falcon and how he and Chewwie became the greatest team pilot in the galaxy. Just keep in mind that this movie probably took place before Episode 1 and there's some familiar faces that you might recognized in this movie. That's what made me shriek every time when I'm watching movies like this.
I'll give it a 3.5 Stars because there's not much action as I wish it would have but it is still a good movie to watch for all the Star Wars fans out there!
P/S: Can't wait for what they will have next!