The keywords already tell you the story outline, so I skip that.

Most of this movie is fan service - a lot of (female) Max Payne (the real one, not the awkward 2008 dud); of Agent 47, a bit of John Wick, a nod to Leon ("all of them")... not too a complicated story, well-choreographed and filmed violence, nice modern Japanese atmosphere:
I got what I expected, a satisfying action flick. And that's probably what Netflix ordered for us, "Because You Watched".


But what made it really worth seeing this movie for me were a couple of minutes of actual acting.
Winstead is great at her Terminator/MaxPayne/Leon/Wick/McClane-Show, and when she's allowed to act, she proves worth being the lead.
But when Jun Kunimura turns up, he expresses so much in a little time, that was what really sold this movie to me.
(Also, solid supporting performances. Kudos.)

Overall: not as bad as critics say. Stylish Entertainment.