We had a pleasant stay. Nathalie was forthcoming and welcoming.
We had not realised the bed was at mezzanine level, although Nathalie writes that somewhere in her announcement, and I was a worried I might fall during the first night.. but all went well.
The area was walking distance from Gare 'd Austerlitz, from where we had to catch our train. I recommend this place for a quiet overnight in Paris.