The only thing to be aware of is that Oracle has changed the game a bit since Sun was in charge of the exam. After August 1 you have to take a mandatory course in order to complete the certification, and you have to take the course even if you're in the middle of the certification! So yes, you do have 12 months, but if you don't want to take the (EXPENSIVE) mandatory course...then I would probably finish the certification within a couple of weeks!
