I stayed here with my wife in July 2018. We really enjoyed our time here. The apartment is in a superb location, you can easily walk to most places of interest or take a short metro or taxi ride to anywhere.
There are cafes, restaurants, shops all nearby. Even though it is centrally located it is quiet and we slept very well each night.
The apartment has a lovely balcony which we used for breakfast and just to chill on some evenings.
The pool on the roof is great and very private.
The hosts were really helpful. We arrived earlier than expected and they allowed us to leave our bags securely there until the apartment was ready. When we checked out they helped us find a great service that takes your bags to the airport for you and allows you to enjoy your last day in Madrid without carrying your bags around with you.
I recommend this apartment and hosts very highly and I hope to come back and stay here again soon.