I have spent one month in Matthias' apartment and I can say that it is exactly as in the announce, with everything you need for living.
It is really well located, within 5 minutes walk from 5 metro stations from where you can access 6 metro lines.
It is also within walk distance of Ile de la Cité and many of the most important monuments.
There are also many supermarkets in the proximity, as well as place where take something. The atmosphere in the area is quite good.
The only problem I might have found is that it is a 5th floor with no elevator, which can be a bit tricky when you have to take your luggage up or down.
I would recommend it for anybody who would like to visit Paris, and I would not doubt in choosing it again if I ever go back to Paris.