First, the good things: The apartment is in a wonderful neighborhood full of restaurants, bakeries, shops, and bars. It is lively but not loud or touristy. Two metro stops are within a short walk. The kitchen of the apartment is well equipped and the hosts left us strawberries and metro tickets (nice!).
Now, the not-so-good things: The listing for the apartment stated that there was a portable air conditioner available. We only considered apartments that had the option of air conditioning. When we arrived, there was no air conditioner and the hosts told us that they only provide the air conditioner when it is "very" hot. It was in the low 80s during the day in Paris that week, and the apartment's windows all face west, making afternoons in the apartment very warm. Although it cooled off at night, there is no cross-ventilation. We put the fans provided next to the windows and that helped bring in cool air, but the apartment still was always stuffy.
Apparently in moving the fans, a small plastic piece on the foot of one of the fans broke off, although we didn't realize it at the time. We reimbursed the hosts for the 23 euros that the fan cost (but really, why have such a fragile fan in an apartment you rent out?).
The drapings over the furniture are annoying and slide off any time you try to sit on the couch.
Mostly we are just annoyed at having been lied to about the air conditioning, as we would have chosen a different apartment had we known.