Good God I have never read such bi-polar reviews for any game and I've been playing a long, long time. I'm excluding the usual morons that drop a 1 because they got a scratched copy that had issues and had to send it back and only including the real reviews from people that played the game.
All I will say is this, if you like me, have never played the first two bioshock games you should really love this game. It sounds to me as if the first two were so good that this one pales in comparison, I wouldn't know. But I would say the new God of War Ascension feels just like that to me in comparison with the first three in the series so I get it.