Positives:
The apartment was exactly as described, with plenty of space, especially for Paris. The street was quiet, but just a block away there are countless bakeries and restaurants. It was great to start the day with croissants and coffee, and end it people watching at one of the restaurants. Personally, I loved that we were not in a touristy area. Metro is close by so that's convenient. Wifi was good.
Negatives:
As a couple of other reviews mentioned, when we arrived there was sediment on the bed in the cave bedroom. It was at the foot of the bed and we didn't notice anymore coming down when we were there, but it was off-putting. Also the AC was set too high, a few degrees lower would have made a world of difference. But the worst part was the lack of hot water. There were 4 of us and I would estimate that half of our showers were in cold water. Definitely not ideal.
Overall: Considering the cost, we really enjoyed our stay and would recommend staying here. Big Apartment, clean, really enjoyed the area. If they fixed the hot water issue it would be 5 stars.