When you book your room, you're done. So for example, in my case, I don't charge anything to the room Therefore, when it's checkout time, I just walk out. Period. I get a "bill" emailed to me, but it just says $0. In fact, the last one in January didn't even say $0, it just had a big blank space in the middle. It's really great to just walk out, without having to pay more!