The real problem was that I rented the room as single room (the payment receipt explicitly states that the rented room was a single room) instead I found myself in a shared room with the host during the first night of stay. On the second day I had to remind the host of the rental condition: Mayeul apologized to me for the mistake but the fact remains: I expected more precision and professionalism. I was in Lausanne for working and this fact brought a big discomfort for me. Also he changed the bed sheets in front of me (and this isn't a professional behavior) but he did not change the cushion cover. He was too hurried both during check-in and check-out. this is the first time I write a bad review in airbnb: I don't recommend this room at all.