We got they key from Karola's neighbor who mentioned that the elevator didn't work. We were very disappointed because our group included 2 seniors (my parents) & a toddler. We specifically looked for a place with elevator as going up & down the stairs would not be very convenient for our group. As expected, my parents were exhausted having to climb to the 4th floor & it made them less enthusiast to explore Paris.
The location of the apartment is very good. So close to metro & bus stop, supermarkets, and a very nice boulangerie right across it.
The cleanliness could have been improved. It was dusty when we arrived, especially the floor.