Recent reviews by Wat | Kjella

An extremely good game, and thank you for making the right call Sony

My biggest gripe is that you can't change which side of the character that the camera is stuck to. It is possible to switch while aiming, but that resets as soon as you leave aim mode

As the game states when you fire it up/start a new game: controller is highly recommended. It is possible to play using keyboard/mouse, but controlling your characters movement is more granular and feels better with a proper analog stick.

I played the game solo with a PS4 controller and the controls were easy to understand and felt pretty good. Controlling both characters at once is surprisingly easy and intuitive.
You control both simultaneously, where the first character is controlled with the left analog stick and L1, and the second character with the right analog stick and R1. If the characters switch places on the screen you can change which character is right/left on your controller by hitting X.

Got the 120 minutes achievement on my first playthrough without any effort (I didn't even know it existed before I got it), so this isn't a long or very difficult game. The difficulty mostly depends on how good the synergy between you and a potential co-op player is, and if you are going for the no death (and other misc) achievements.