There's boring power fantasies for boys.
This is the same boring power fantasy, but for girls.
The characters are flat, the action well filmed but inconsequential, the story nonexistent, and the entertainment value... don't be sober if you want to be entertained. In the genre of mindless action entertainment, this is still at the bottom of the barrel - like some of the 80s action movies which are better off forgotten. Nice styling and set design, though.
The actors did their best given what they had to work with, but it is only Margot Robbie who impresses by making the main character watchable by her acting.
Verdict: Even if you are in for mindless action, don't waste your time on this. Clips are enough to see style and script.