The place is not too big but because of its distribution it is very comfortable for a family of up to four people. I'm not too sure about a group of friends because in order to access to the bathroom you have to pass by the main bedroom.
The kitchen (and the rest of the house) is fully equiped and there are quite a few free items left by the owner and/or previous travellers.
The owner is very nice and responds quickly, he met us upon arrival and before we left, and was always friendly.
The best thing about this place is the situation: Very close to a Metro station in Line 1, which takes you directly to lots of central places and less than 10 minutes from Gare de Lyon. If you take the RER from Gare de Lyon (same ticket as the metro) you get to Les Halles in about 5 minutes. If you are planning to go to Disneyland Paris the train takes you there directly and that is a big plus in terms of not leaving too early in the morning and making it home easily.
The surrounding area has nice restaurants and shops. There are quite a few supermarkest and shops in a 5-10 minute radius.
In short, I would definitely recommend you this place and if we go to Paris again we will definitey stay here once more.