Your mileage may vary, but to me, this was perfect.
No time wasted on origin stories or useless world building, the foundations are presented through the story and dialogue. If you liked David Ayer's previous cop movies and like fantasy (or Shadowrun) you'll at least like this if not love it. The story leaves a lot of place for sequels, while being it's own complete tale. I wish I could have watched this on the big screen.