Reading the IGN review, the game sounds quite tedious (poor shooting and aiming controls, crappy camera, very slow pacing, etc.) Apparently it also takes forever to get to places with your car. It wouldn't hurt to rent it. But I'm going through a couple rentals and FF13 is coming out in 13 days so I might put it off for awhile.
I don't think IGN is in the wrong if the gameplay is as broken as they describe it. No matter how cheap a game is, it is critically important that games be fun. Even if they are free. Also a great story can't make up for 20+ hours of crappy, clunky, tedious gameplay. I'll have to see for myself if the gameplay is that bad. It would be unfortunate if the gameplay sucked because I think I'd like the story and atmosphere for this game. I wouldn't be prepared to invest 20+ hours in a game I didn't like just to uncover more of a good story though. I'd be better off reading a good book or watching a movie or tv series I enjoy if story was all I wanted.