It is a small apartment in the center of Paris. The neighborhood is quiet and you have 5 minutes walking distance to a metro stop and many restaurants and a young atmosphere. In the photos it looks small, but in person it seemed smaller. In the bathroom if you are a bit tall, you can't sit down without your knees touching the wall. The cleanliness could be improved, there was dirty cutlery and the floor was not completely clean either. The sheets and towels were very clean. In short, it is a place to sleep and little else. Don't expect to do much living inside the apartment.
If you want something to sleep and visit the city, this is a good and cheap opportunity.