This place is small and basic (as stated) but perfectly fine for a short visit to Paris on a budget. A part from the very slow (at times unusable) wifi (forget streaming), the description is accurate. The kitchen/dining space is very light and the window outlooking the garden is extremely charming! The little library is a very nice addition, and my daughter was happy to find Boule et Bill in the collection. The location is very convenient - close to several Metro stations which take you to the centre, and also with easy access to Disneyland. :) The little shops, bakeries, restaurants and coffee shops are also very convenient and the neighborhood seemed safe - once we came back at 1 am without any problems.
The locks were giving me some hard time but I guess they require some getting used to. Since we were coming during a supposed "heat wave" I was a bit worried about the absence of air-con, but actually it was not necessary at all. Providing we closed the window, the location at the ground floor allowed us to always come back to a nicely cooled place after a hot day of sightseeing.
I am not giving the full 5 stars due to the excruciatingly slow wifi (+watch out, the password written down is incorrect), spiders in the bathroom which freaked out my daughter and a bit of a confusion at check-in but in general I would recommend this place.