My wife and I were very happy to have chosen Delphine's flat for our visit to Paris. It served our purpose very well.
It's some way out of the centre of the city but that's what makes it affordable. The metro - Marcadet Poissonniers - is only five minutes' walk away so all of the city's sights are within very easy reach via lines 4 and 12.
The neighbourhood has bars and shops and restaurants, notably on Rue Custine. Sacre Coeur is within walking distance but it is a stiff climb.
I was surprised that the area was quiet at night. We slept with the windows open because of the heat but there was barely a sound between midnight and 7 to disturb us. The building itself is very quiet too.
We struggled with the cooker. Anyone accustomed to an electric cooker might find it second nature. We had to give up on it.
Visitors who are not fit and have luggage to carry will find the five flights of stairs a challenge. But this is a minor inconvenience. It's not a reason to turn down Delphine's flat.
We did not meet Delphine but she was always available via WhatsApp to discuss any issue.