I stayed at Dervy's place for two nights and it was in a great location to get around to the sights in Madrid. Really close to the metro station and easy to get to from the airport. The place had everything I needed but was quite small, so wouldn't be great to stay in for longer than a few nights. We met the host outside the apartment for check in and he was a little bit late but was very nice and gave us some great information about places to visit. The apartment is right beside the stairway so it does get quite noisy at night when people are coming and going and the lights outside the apartment turn on as people walk by. It was fairly clean but could use a nice deep clean in the washroom as it is a bit older and does have a little bit of a smell when you walk in. Overall, it was a great place to stay in for a couple nights if you plan to be out and seeing the sights for the majority of your time!