I honestly didn't enjoy this movie much. I used to love Barbie as a kid, and I couldn't relate to this movie at all. Where was Teresa? Christie? Where were Barbie's sisters? Midge? From memory, Barbie was the Blonde one, and the others weren't Barbie - they all had names and even personalities. I felt like this movie was so focused on pushing a political opinion that it dropped the ball with everything else. Also, Ryan Gosling looked nothing like the Kens I grew up with. I don't remember ever seeing a Ken with platinum blonde hair.
This movie is all about pushing a political opinion - so if you favour leftwing politics and feminism, then you will probably enjoy this film.