I got this on my opening bid of $62. As soon as I won, I realized I had only booked for 1 night and I need 2. It offered me the option to extend my stay at the same price. I clicked on that and went through the process, noting along the way that it said it wasn't guaranteed. When I got to the final click, I got a "Sorry, we can't extend your stay" message. And because that attempt at extending my existing bid counted as a new bid, I now need to wait 24 hours to see if I can repeat this deal for one more night.