I stayed here with four of my friends and we absolutely loved Yohann's place! Eugenie checked us in and was very gracious and welcoming. She gave us a tour of the flat and (thankfully!) told us how to use the washer/dryer and the other appliances around the house. The bedrooms are decorated beautifully as well as the bathrooms. For those with long hair, there are hair dryers in both bathrooms!
There are plenty of maps and guide books, and Eugenie showed us on the map where the local markets and boulangerie were. The flat is about two blocks away from the metro station which was great for easy travel. It's also a very central location and almost everything to see is within about a 10 minute walk.
As some reviews have stated, the wifi was spotty. It didn't seem to work in the bedroom with two beds. It did work well in the living room and kitchen area. The spottiness never was an issue with us, we were only in the bedroom to sleep anyway.
Yohann was very upfront about the location and "colorful ladies" that frequent the street day and night. Eugenie also reminded us of this and to not take pictures. We adhered to this advice, and the ladies were never mean. None of us ever felt in any sort of danger during the day nor night.
I would highly recommend this listing for anyone who wants to feel like they are a local in Paris. It is quiet and feels tucked away from the tourists, and is an easy walk if you like the hustle and bustle or anything in between that.