We loved our stay in Sibylles appartment very much.
The neighbourhood was just lovely: a beautifull park just nearby, several cosy restaurants (Chinese, African, ...) and pubs, a supermarket at walking distance and a metro stop just down the street.
The appartment was lovely: a nice kitchen with a kitchen table, a good bed, a cosy livingroom and a surprising view over Paris if you look for it (worth the 6 flights of stairs ;-) ).
The bathroom wasn't that big, but had everything we needed (a toilet, a shower, a sink and a mirror. There was even a washer.
Sibylle was a very nice host, who responded very quickly to our mails and answered all the questions we had. She was very flexible about our time of arrival and departure.
We would recommend this place to everyone who wants to visit Paris.