6 of us stayed at Mathilde's place over the weekend. We enjoyed our visit very much. The flat is easy to find and prettey well located so that one can explore Paris on foot. The check in instructions from Mathilde were precise and we had no difficulties to access the flat. The place is big enough for 6 people, clean and comfortable. I can recommend Mathilde's place for a group of travellers.
Best wishes
Irina