We had an awful experience at Hotel Rachel in Paris. And an awful experience booking through Hotels.com.
Firstly, the guy in the reception would not let us check in to our room. His reason being that we arrived after the reception had closed. The only problem was that we had booked through Hotels.com with the promise that we would be able to check-in until midnight. After about 30 minutes of discussion with the guy at the reception he finally gave us a key.
Upon entering the room an awful smell of sewage hit us. The room was definately not clean, as witnessed by the odor of sewage and the cobwebs in the corners of the room.
When we booked the room we payed extra to have our own bathroom, which was a waste of money, since the toilet wasn't even able to flush.
At this moment we were already looking for other hotels online. But the thing that made us leave the hotel immediately, and go outside with our luggage on the street searching for new hotels, was the fact that we found mold on the walls, particularly in the wardrobe of the room. A clear health risk that didn't seem to bother the hotel at all.
We called Hotels.com's support line to ask for a refund of our money, but the answer was: "Unfortunatly we can't give you the money back, unless the hotel agrees to it". Mind you this is the same hotel that do not hold up the agreement on check-in times made, and that deams it fit, to put a pregnant couple in a mold infested hotel room with an unflushable toilet.