First the best part: the location is perfect. Very central and just off a major boulevard that is popular with locals, yet tucked away in a little courtyard filled with kids. For us the location really couldn't have been better. A short walk to the Seine, Louvre, etc. and a quick Metro ride to just about anywhere.
Second, the place is a very basic studio, smaller than we had expected, but clean and adequate. Surprisingly missing some basics such as places to hang up towels, a dish rack, etc., but it served its purpose.
Logistics weren't great -- we were told to look for the "big red door" but there is no big red door. We never saw Driss nor Max, not sure how long since they've been here. But we're independent types, so no big deal.
The worst of it was an incident on our last night. At 1am, after going to sleep, the buzzer was rung many times. We ignored it, thinking it was someone mistaken or drunk. But shortly after the buzzer stopped, we heard a key in our lock and our door was opened by a young man. I got up and stopped him from entering, he said that he was a neighbor and needed to reset the internet (!). I explained that we were asleep and he apologized and went into a neighboring apartment. Afterwards, we recalled another incident where we returned to the apartment only to discover that one of the windows was open. Since we hadn't opened it, we were puzzled ... but now suspect that someone had been in our apartment while we were out. As far as we can tell, however, nothing was taken from us.