This spot is a short walk to Auber station - it takes a little bit of navigating to get to and from CDG airport and this flat using the metro, so be prepared if that is your plan. The space itself is small, but fit 4 adults. The bathroom was clean. At the time of this review, there was some kind of renovation or construction going on in the bottom floors of the building, which made us unsure at first that we were in the right place, but someone inside the apartment complex helped direct us to the flat.
Felt secure, as there were several layers of codes/doors to go through in order to reach the space - good for safety concerns!
At night, the stairway isn't lit (or at least we weren't sure how to light it), so you will need to use your cellphone flashlight to guide you up and down.
Overall, we had a good stay! Good value, and it worked out for us as a quick replacement spot after our original Airbnb host had to cancel.