In general Claude's flat is cosy, very clean and located within a lively neighborhood. I just wanna mention 2 remarks but one should not consider them as negative. These are just to give a bit better description of the place.
So the first thing is that the flat is facing a busy street where the vehicle traffic is ongoing until 23:00. If you are sensitive about outer noise, this place might be a bit loud for you. Secondly, the bathroom is not big enough for tall people.
Nevertheless, I highly recommend Claude's place for your next Paris trip.