I had a great stay at Helga's place. The apartment is quite small, but I did not come to Paris to stay indoors. For 1 person it was fine. A couple may find themselves cramped. It has a shower, toilet, mini-fridge, small stove, and a bed.
The neighborhood is very nice, with shops a few blocks away and a nice park a short walk away. Not much for night life, but there are several metro stops very close.
Helga was very helpful and communicative in the lead up to my stay. Check in and check out were both very simple. I'd be happy to come here again.