The location of the apartment is top, nice area of the Marais (super central and lots of different restaurants, cafés etc.) around. The window goes to the tiny courtyard, what makes the apartment very calm, but also a little dark because you look directly on a wall (I found this ok for two weeks). The apartment was very clean and the American kitchen was well equipped, I liked also the real bed (often in Paris you have these clic-clac-sofas).
The internet was not working well in the beginning, but Dominique changed the router and after this it went very well.