If you enjoy watching other people play video games then you'll definitely enjoy this.
There's lots of action, weapons and style - all the things we've come to expect from a John Wick film.
Of course it's ridiculous - all of them are. The mere idea that you can deflect bullets with a jacket lapel gives you an indication of how far from reality this film is. Keanu Reeves sustains what would be critical injuries half a dozen times - and shakes it off without any ill effects.
With one exception, the amount of damage a character can sustain appears to be directly related to how important they are to the story. Most of the victims in the extensive gun battles (at one point it appears Keanu Reeves is single-handedly depopulating Paris) are gone after a couple of shots. If you have a speaking part then you can take much more damage than any of the extras.
The whole idea of the "secret assassin society" only works if you don't draw attention to yourself". So having a full blown Blackwater Contracting reunion at the Arc de Triumph isn't exactly the best way of keeping things on the down low.
Throw in a Mr Chow-esque (from the hangover) character and then deciding to make him blind really shows how silly things have got. Last time I checked, gunfighting requires you to be able to at least the person you want to shoot. That said, he is at least still more convincing than Ruby Rose was.
The first John Wick film was such a hit because the audience felt a connection with his loss and wanted him to be successful seeking revenge on what were some nasty (if ineffective) bad guys. At this point I'm not really sure what John Wick is supposed to be fighting for. He just lurches from one noir styled location to the next before embarking on an unrestrained killing spree, leaving dozens dead in his wake - you wonder if these people have families.
If you liked the second and/or third film, then you'll like this. It requires little to no thought and the plot is as by the numbers as you'd expect.
That said, the action, although resembling a video game, is very well shot, there's lots of cool locations and stylish outfits. Despite the tactical nonsense and the fact that the bad guys wait in line for their turn to attack him, Keanu Reeves has genuine skill in martial arts and pistol shooting.
It's as constructive a use of time as playing 3 hours of Call Of Duty in your best suit.