This place is lovely and a great value. There are great cafes, bakeries, and restaurants in the area. The metro is close and it is a short walk to the Eiffel tower.
The one thing I would recommend that you (and the owner) pay attention to is the details at checkin and checkout. Plan accordingly to go to a local cafe first (only about a five minute walk). You wil need to pick up a key and MAKE SURE you also get the BLUE FOB (and the black fob). If you do not get the blue fob you will not be able to drop off the key. Also - do not ask the staff at the cafe for help....they do not seem to want to help.
Have fun!