Ideal location- surrounded by several metro stops so you can go anywhere in Paris quickly. A quick walk to the Luxembourg Gardens too. The apartment is clean, updated, and has extra mattresses. We were very comfortable there. Kat is a very attentive host and was accommodating when we checked in later than we had told her. There are several flights of stairs, so keep that in mind.
The only thing I would change is that the airbnb photos need to be updated. The apartment has been renovated and looks different now.