I enjoyed my stay at Nan's place. Having the entire place with a washer and fast internet at a reasonable price was just what I was looking for. There were lots of shops near by and the metro is super close as well. Nan and Yufei were super quick to respond to any messages I had.
However, this place may not be for everyone. This isn't in Montmartre. It takes about 30 minutes to walk there or a couple stops on the metro. There are people who loiter by the metro stop which could be a bit unnerving for a solo female traveler later at night who is not used to urban areas. I felt fine, but I could imagine others may not.
I am grateful I found Nan's place! I was able to visit Paris during the day and to telework with larger files easily in the evening.