We liked this place a lot!
A few things to note, which may be common about apartments in Paris - the place isn't very big, and the bathroom is small. The nice thing was that the toilet was in a different room from the shower, so two people could be using it, but both very quite small. There was not much by the way of kitchen amenities, but since we werent planning on cooking anything, it was totally fine.
The primary issue we had was the noise outside, especially at night. The apartment is in a very noisy area, and overnight (up until 3-4am) there was a lot of noise from bars, and also from work being done in the alleyway that the apartment connects to.
The host was super responsive, and check-in instructions were very easy to follow. We felt very safe in the apartment, and the neighborhood was really nice too!