I've never run into your exact situation, but I have had a couple of experiences when I've booked a NYOP through PRICELINE and then the hotel couldn't "find my reservation," and were unwilling to help despite the fact that I had the confirmation sheet from PL (I even showed them the rate and all!). My most recent experience was at the Sheraton, south of Santa Rosa near Petaluma. Luckily it was a Sunday night and not crowded so I was able to call PL and they spoke directly with the hotel desk clerk. Whatever happened, we were allowed to go to a room and PL said they would take care of it (and they did). I agree that once in awhile you hit a hotel that isn't up to standards, or a hotel that you were trying to avoid (even at the 4* level). The great thing about this site is that they have a wealth of prior hotel wins reported to the Board and you often can determine fairly specifically the range of hotels (names and star ratings) that may be won on a NYOP or Express Deal through PL. That helped when I won a New Orleans hotel today. All 4* listed in the Convention Center and Downtown were acceptable to me. There are a couple French quarter hotels I like to avoid, and since they were listed as possible wins, I just avoided that area. I won the Marriott at less than 1/2 any advertised, prepaid price that identified the hotel. That's PL working for you. I also agree that I enjoy when the desk clerk states only that I am prepaid and just need a credit card when checking in for incidentals. Not sure why I care when they announce, "I see you booked through Priceline!" At least I try to take it as booking through any agency, but I know everyone assumes it was NYOP. Which, given the fact that I pay around 50% less than even a good advertised special, that makes me feel pretty good when I'm on another trip I was able to afford because I saved so much money on PL. Not sure about the Booking.com situation. Even when booking through the BB site at a Hilton (I also like to keep my elite status, especially when someone else is paying for my hotel stay), I am always asked for a credit card for incidentals. Even when I prepay for a reservation at the Hilton.com site to save 10%. I'll be interested to see what others say, but I'm a die hard PL fan from long ago and love spending the money I saved on hotels on a rental car and great food (or another trip)!