My husband and I absolutely loved this apartment! We stayed two nights and it was a perfect choice. The location was brilliant, very close to the metro station (E. Marcel). It was warm and dry and we didn't feel the cold when Paris was 8 degrees! The facilities were excellent: wi-fi was very quick, kitchenette equipped with new dishwasher, oven and a clothes washer/dryer.
Danielle was a fantastic host and although we never met her, she was easy to get hold of and provided us with maps and recommended local eateries.
If you're looking for a base that is central, has a comfortable bed and no street noise, then this is the place.
We honestly have no negative feedback and we will definitely be booking this studio again when we are next in Paris.