Just finished the game (PC). Didn't expect much more than an average shooter but while there's definitely some wonkiness to the game, it's one of the best FPS campaigns I've ever played.
Like:
Great story, amazing characters, fun music, tight gunplay, incredibly immersive world, for the most part: extremely good looking, perfect pacing, nice mix of linearity and open areas to approach in different ways (wish there was even more stealth though), home base is an amazing addition that breaks up the violence with some intimate character moments and world building, really cool settings, mostly challenging and smart AI, and above all: the seemingly impossible ability to string together humor, slapstick violence, profound moments, sleek punchy presentation, and dark themes seamlessly (Tarantino pulls it off now and then, but I've never seen it in a game).
Dislike:
A slightly unruly stealth system where occasionally it's unforgiving but also has oddities (like enemies not caring if another enemy is killed in front of them so long as you're crouching and use a silencer/knife), occasionally arbitrary movement limitations (why can't I jump on that thing), uneven graphics in rare spots, the lack of transitional cutscenes between chapters showing travel was jarring now and then, and overall it had a good but predictable ending.
I don't think I'd want multiplayer but a deep firefight/horde kind of mode would be really welcome as the sandbox is pretty diverse and it'd be nice to have a mode like this in a game that enable stealth options. Machine Games impressed the hell out of me though, can't wait to see what they do next.