I rented Paule's studio flat for 3 nights during my visit to Paris. Well in reality I didn't have any problem with the flat it was nice and clean although not really welcoming.
I collected my keys upon arrival at the reception but I couldn't open the room door, having tried all the possible ways I had to go down and change my keys when reporting to the receptionist she was staring at me and didn't really like to help me sorting the issue. Perhaps she thought she was doing me a favor or something but her reaction to the problem didn't make feel good at all. You can even rent a 5* flat/hotel but with bad customer service you simply cannot enjoy it 100%.