The cinematography is beautiful, most of the actors did a good job, Jack's actor did an excellent job. It's good they tried a different type of story but it needed better writers.
As an action series
Ep. 1 is rushed, some scenes are so badly written they make no sense, later episodes have too many filler scenes they become boring.
Fighting scenes and action scenes are poorly written and executed. There is no tension, it does not matter how much a main character is hurt a min later they act like it never happened, side characters are made of eggshells, touch them and they drop immediately. It does have a few good comedy scenes, one good sad scene.
Had a lot of potential and could have been really good if the story was written better.
As a BL
In my opinion they added the romance just to attract a certain audience but did not hire someone who can write a love story. In 4 episodes it barely has a few minutes of romance, there are more scenes where characters talk about a possible romance between Jack and Joke then actual romantic scenes. Unfortunately the main couple has no chemistry so it's not really a BL.