We have booked a room via "guest reservations". It looked like we were booking on the hotel site. We have received an email that our reservation was confirmed. An amount of US$ 272 has been paid by Amex. However the hotel didn't have the reservation and we had to pay the hotel again for the night. It looks like "guest reservations" is a scam. I made a complaint on the site of "quest reservations" and wait for their comment.