Sadly we did not get the service we paid for. We went out and had troubles to enter the main door early in the morning as we did not have all keys! Pay attention, you need three keys to enter all doors as the main door has two locks that is why we could not enter (we did not even know that there is a second lock in the main door). At this time all was closed and hardly no one wanted to help us. Neither one from the neighbours was opening the door nor we could reach our host for more than 6 hours. There are also different contact persons each time: on the phone and for the check in...
The apartment itself was nice and clean! It is also well located.
Have a good time in Madrid and make sure you get 3 keys!