We - 6 people - spent 7 nights at Nicolas' place. Almost everything was great, apart from....the contact with Nicolas before our arrival...
The place is close to Etienne - Marcel station, walking distance to Louvre, Pompidou and Notre Dame. The price is not very high comparing to other places in the heart of Paris. Very cosy place, supplied with everything you need during your stay on holiday. Unfortunately, I was really excausted and wasted a lot of time trying to contact Nicolas before our arrival. Write him week or longer before your journay. I mean asking about the address and the keys. Both me and airbnb office tried to get in touch with him two and one day before our trip and he had not answer until a little bit after 18 hours the day before we flew to Paris. I had an opportunity to talk with Nicolas for about ten minutes at his place, he is a very nice guy, But....I wouldn‘t like to experience the same stress again.