I usually leave a five-star rating and leave points for improvement by private message, as long as the place is reasonable and the host is will to listen. This is an exception for two main reasons, and each cost one star.
The first is the strong sewage smell in the apartment, which we never experienced in any other AirBnB or Hotels. It is really unbearable and the host never mentioned it before hand.
Second is the attitude from the host. In stead of acknowledging the problem and trying to alleviate the situation, he made it sound normal and even told us that it is not his problem but the building’s, and if we have a problem with it, we should complain to them…
Not sure how much of it was lost in translation but hard to imagine anyone would expect the same experience.
In addition, there are a few other issues which does not match the description. For instance, there is a photo showing that the Eiffel Tower was viewable from the balcony, and it in deed viewable, but you have to stretch your head really out from the furthest corner, and the actual view is blocked in the middle by stairs of a building, no way to see it like it was show in the photo on the listing.