Although the apartment is small, it has everything you should need for a short trip to Paris. Because of the system with the key in a lockerbox, you are completely independed from your host which makes it possible to arrive at a time which suits you (after the check-in time ofcourse).
The apartment is located in nice and relative quiet part of Paris eventhough it doesnt take long to reach places buzzing with people. If you walk from the apartment straight to the centre, you come across a lot of the famous sites north of the Seine.
Long story short, a great place to stay.