Get it a hell of a lot earlier than needed, mine took a month. I wasn't going anywhere in particular, I just wanted one and they are good for 10 years.
They aren't that expensive, almost everyone ought to have one, and they work perfectly fine as ID. Its a lot more convenient to hand that over to TSA in the airport than to dig your DL out of your wallet, and they look kinda cool, too.
how many emo kids does it take to change a lightbulb?
none they just sit in the dark and cry