Isabelle's home is really lovely and on a GORGEOUS street. Very picturesque. She is extremely accommodating and was happy to speak English with me as my French is non-existent. The room itself is nice and basic with a bunk bed, just right for one or two nights' stay. If you have a tough time with a firm mattress/pillow, I recommend bringing your own pillow as I woke up with a sore shoulder. But it did not affect my stay or impression of the place. The cats are really cute and affectionate.
As for location, I could not have asked for better for my purposes. It is very close to the Seine, and probably only 45 minutes from the city center if you walk slow. The house is close to cafes and food stores. I recommend this Airbnb.