The studio is just as seen in the photos, it is small but conformable and has enough space for two people, specially if you lift the bed during the daytime. It has enough things in the kitchen if you want to cook something, have breakfast or just have a coffee. The heating works fine too, so no problem with being cold.
There are several bus and metro stops near the studio, as well as supermarkets and all kinds of restaurants. Arc of Triumph and the Eiffel tower are also 10-15 minutes away walking, and the train station to go to Versailles is 5 minutes away, so its location is really good.
The only things I could complain is that the toilet may be a bit small if you are tall (but that is shown in the pictures), but it is not too uncomfortable; and a couple of glasses had some water stains, probably from the dishwasher. The rest of things were just fine.
Hans was a really nice guest, answering quickly to all of the questions I had.
Overall, I would really recommend staying here.