I Love this game still havent completed it yet, lol,
(suprising though i usually complete my games within 2 days of getting, but i got 6 games in 2 weeks so iv been swapping in and out of games)
anyway, if you are like me and can complete games fast, i suggest renting for around 3 days, i feel it doesnt have much replay value, and when i complete a game i rarely go back to get 100%, though tere are few exceptions, RESIDENT EVIL 4 being the best, iv completed it 4 times over now and still love it.
anyway, rent if your quick, if your slow, buy it then trade it in, its a great great game well worth it.
i sometimes buy my games from second hand game stores they are cheaper and when you complete them take them back saying,
"it didnt work" or "i got this for my little bros birthday but he got 2" or "this isnt the game my sister wanted"
blah blah blah lol