I recently stayed in Martine's place for a mother-daughter Paris adventure. It was perfect for us: located right next to Champs de Mars/the Eiffel Tower, close to a major subway station, and quiet at night. There are several restaurants and good bakeries nearby too that were nice for a breakfast before our adventures and for drinks after. The apartment also has a nice large window that looks over a quiet street. We spent a couple nights with a bottle of champagne just relaxing by the window.
The apartment is nicely decorated and you have all the necessary amenities (Martine even supplied us with some basic food like bread, milk, coffee/tea, etc.). At first I was worried about the double bed not being large enough for my mother and I, but there was plenty of room. There is also a couch that makes a comfortable bed as well.
If I were to go back to Paris or had any friends going, I would book/recommend Martine's place.