Awesome place to stay. Really great location, literally walking distance to everything. The hosts were really thoughtful and welcoming (their previous guests checked out early, so they cleaned the place themselves because they knew we were flying in from Australia and thought that we would like a shower... Which we did!). Nadia also gave us a lot of local information such as where to get good coffee and pastries.
It's a great place, but there are a few things that might bother some people... The only things to be aware of are that being a typical Parisian apartment, so it can be a bit noisy at night (there is a pub at street level), especially because there's no AC and the windows need to stay open for airflow (AC isn't common in Europe). The apartment is also up a small winding staircase that might challenge some people, but other than being a hard slog on the first day with our packs, wasn't a concern for us.
Overall, I would definitely recommend this place and I will stay again if I'm lucky enough to come back to Paris.