My daughter and I stayed in Madrid for 10 days. Luis' place was right in the center of all the tourist attractions. Grocery store was close by all the different kind of restaurants were literally just out the door. If you're looking for a good location, this is place to be.
One downside was hot water wasn't enough for two people to shower. We had to alternate showering. And if you run the washer, there's shortage of hot water as well. The bathroom had sewerage smell that we always had to close the bathroom door.
Apartment was quiet most of time. Somehow we could smell the someone smoking. I don't know where the smell came from. Apartment was little outdated but it was comfortable to stay overall.
The door lock system with the app was very convenient since I didn't have to carry the actual key because I could open the doors with my phone.
Luis was very responsive with text.