Bought it, loving it. The review is correct, this DEFINATLY plays like a movie, so you gotta take the "EXPERIANCE" into account. Alot of the enemies are reskinned versions of each other (though admittedly, very prettily reskinned). Sometimes the gameplay gets repetetive, but in this case the frequent breathers to soak up the atmosphere actually HELP the game. It would get very boring, very repetetive, very fast- but with it's movie pacing, every encounter is frantic and breathless, and the game does a good job of shocking you and being spooky. It's not frightening by any means, but spooky. The dialogue and story are great, of course, the weapons are fun if a few on them only have videogame cliche uses - I can find no use for the slime tether except a few gimmick puzzles that require it. Shooting a giang booger is fun though.
It looks like it's going to be about average length, 9 to 12 hours depending on how you play, but thats one of those "probably a good thing otherwise it'd wear out it's welcome situation". I strongly suggest you take your time when playing, and switch from PKE meter to normal vision often - the atmosphere is better to take in, in normal vision.
Can't comment on the multiplayer, sounds fun though. Frankly, as frantic and easy it is to shoot your teammates in singleplayer is? This will be goddamn crazy online.