The location of the apartment is great and could not be better. The neighborhood is so amazing, very lively and colorful. You can get everywhere easily both on foot and by metro.
The apartment itself is typically Parisian, you should be aware of that. That means: small, low ceilings, old windows and everything else that goes with an old building. For long-term stays, the apartment is less suitable, because a desk is missing and the kitchen is too small in the long run. For shorter trips to Paris, however, the apartment is perfect.
Apart from that, Gaelle is very nice and quick to help when there are problems.