I was a solo traveler at Ines’s place and I have to say I had everything I need. I was in Paris for 1 week and was visiting for the whole day, so for me, a good place to sleep and a clean bathroom were pretty reasonable. The room is not immense, but I think it is properly big. I mean, you don’t come to Paris to just live in your room, right?
Ines is a very nice person who offers her help if you need something. Her mother indeed lives in the apartment too, but she’s very sweet, I didn’t mind at all.
If you think about renting this place for your visit to Paris, which I recommend, you should know that you will have a bathroom with a shower and a sink in your room which you’ll have to share with Ines, but she asks whenever she wants to use it. Also, the toilet is separate. You will find it in the hallway in a very small space (a bit bigger than the toilet). I think if you are too tall or muscular you won’t fit in, but for me it was ok (160cm).