How much more you pay often depends where you live. I have seen many times on this site people claiming they've saved $1,000s by using NCL's BOGO. I don't know about you, but $1,000 or more isn't "a little more." There's no one right answer to this. Some people like to have control over their reservations, while others are happy to relinquish control in exchange for saving money. Same with travel agents. Some like to do their own bookings, while people like me enjoy letting someone else make the phone calls, etc.