This a great little apartment in an amazing location. Less than 10 minute walk to the Louvre and within 5-10 minutes of many bus and metro stations. The place was great for me and my teen. I stayed in the bedroom with the Queen bed and they stayed in the main room on the single. The beds were very comfortable.
Although there is no air conditioning, with the fans going and the windows open we managed fine even when it was 33 degrees outside. The apartment faces a small courtyard and is very quiet.
You need to be prepared to carry your luggage up the stairs and for a tight space in both the shower and the toilet area which was no problem for us but may be for others.
Jane and Suzie were amazing hosts. Incredibly responsive and helpful and the instructions for accessing the place were perfect. We had no concerns getting in or checking out. I may or may not be back to Paris anytime soon but if I return, I would definitely consider staying here again.