Rent it so you won't miss the money
At first the game is nice, you beat your first colossi, yay for you, then you realize that everyone is defeated the same way, it just gets harder to climb it. By harder I mean "frustrating".
At some moments you might get annoyed for trying to climb a colossi 20 times with no success, waiting to heal yourself after everytime you lose most of your life, etc.
The camera often moves the other way you want it to even without your doing, making your character not visible; all the colossi look very similar and you will most likely want to kill the dumb horse after just a few minutes.
I also find the way the main character runs very weird and disturbing; he runs like a woman, shaking his ass while running; shaking it a lot.. They made the main character very gay...
In conclusion you will find it boring and decide you don't want to play it anymore. I did. The idea of the game is good - beating super giant monsters, but the way it was put to life is just sad.