The reviews for Bioshock are pouring in, they are insanely high!!!

BioShock (xbox360: 2007): Reviews
97% from 17 critical reviews(11 100%'s!), 91% from 271 user votes

BioShock Reviews
97% from 12 critical reviews(7 100%'s!), 85% from 27 user votes

I'm very interested in this game. Currently I plan to rent this game but I don't know if I will beat it or buy it. This is because it's a first person shooter with rpg elements, and I don't like first person shooters. What do you think of these reviews?