Play it like you would read a quick cheep thriller novel.
It isn't the best thing. The plot as a whole, isn't the best story EVER written, but there are some amazing gems. The opening mystery is great. It pulls you in. As things get more complicated, it continues to supply you with really great stuff. There are some really challenging dialogs about freedom and repression in here that really make you think. It seems real. It seems possible.
I wasn't let down for a moment until the plot starts to climax. You begin to see more unbelievable moments, but they relate more to what the character does, than what is happening in the larger plot. This ends with a semi-silly "final boss" kind of puzzle that is really rather dull. Then they threw in some really cliche ghost in the machine elements, and concluded a really great game with a rather lackluster ending.
But all in all, it was a very entertaining adventure. I don't regret a moment spent enjoying it. Play it like you would read a quick cheep thriller novel.