Just beat it and as I was beating the final boss, I was kind of upset. I beat the game very quickly, even when making sure to do as much as possible. Now, I didn't do everything because... well, I didn't think the game would end that fast. In the previous one, they gave a warning like "This is your last chance to do everything" before you fought the final guy, which didn't happen in this one.
Overall, I got about 80% of the secret stuff, but didn't get it all, and beat the game in about 10 hours. Not my favorite, not even my favorite on this system. I really think the first R&C on the PS3 was much better than this one.