As the last comments, the place is noisy. you will hear every neighbors.
The key system is fallible : the last guest did not put the keys in the right place so we had to contact the host and then wait for an hour to get inside. (then he called us to get there FAST, taking 10 minutes to remove the keys from his keychain)
Apart from the key incident, everything was smooth.
If you get the apartment in the roof, just know that the head-space is about 1m60 in half the apartment. *bonk*