(Short review) Painfully average.
It's one of the reasons why I liked the first one so much. It had great characters, dialogue and story but was hampered by shoddy gameplay and broken squad mechanics.
The more I think about this game, the more I think it should have been a movie. This game has double the running time of the average movie runtime, and I honestly think it would do well at the box office if it would get a good screenplay and actors. Just make this game into a movie.
I would understand if people wouldn't like this game (or franchise) but I don't understand the massive hate behind it. It's just short, it has generic Gears of War gameplay mechanics, it has throwaway multiplayer and it has the most awful ending in a videogame since Borderlands. All of this makes it a painfully average game.
What I do like about this game is the look of it. As you probably know, everything looks like it's been shot with a cheap camcorder and put onto YouTube in 240p. It looks frigging fantastic and very authentic and I do really love it. It would fit a game in the style of Heavy Rain or Indigo Prophecy but not an intense action game.
If a Kane & Lynch 3 is ever made, I would definately buy it, regardless of review scores because of it's charismatic characters and dialogue. But that's just me.
Perhaps developers (not just IO Interactive) should consider cutting a chunck of the game's asking price on release before charging us full price for a game like this. I mean, the developers do know regular gamers ARE going to finish this in an afternoon, right?