I went into this movie with super low expectations because the trailer looked boring, and the reviews were really bad. However, I actually found myself enjoying the movie a lot. I know it's pretty cliche in some places, and the girl who played Jane did a good job, though still seems pretty unconvincing during fight scenes. But still, it was great.
It made for an easy, light hearted watch despite its action theme. I liked the friendship between the girls, the music, and almost everything about the movie.
My advice to anyone with inhibitions on whether to see this movie: "just see the movie. Ignore whatever has been said by critics or whoever else, just go into the movie with an open mind. And you might not love it, but you'll definitely not find it to be a boring ride."