I had a very pleasant stay at Hélène's place. As listed, it is small, but it's the perfect size for a single traveler who will spend most of their time out and about.
I loved the space—I prefer a cozy, traditional style to something more modern, grey, and cold. It's a personal preference, but I loved the wood paneling, papered walls, and shelves filled with books. Hélène was a very kind host and I never felt intrusive when using the shower on the third floor in her apartment. The building is also located centrally in the 7th, an arrondissement that is quiet and residential, and is a short, 5-minute walk from the 8 line which will take you directly into busier neighborhoods.
For short stays, Hélène's place is perfect.