Communication with Carmen and Ada was easy and prompt. Even though our flight was delayed for 3hrs, Ada was very comprehensive about it, waited for us and gave a very warm welcome.
Checkin and checkout is very easy.
The apartment is suitable for a couple. It was clean and have all necessary amenities. Moreover the train station is next to the apartment ... so from airport you can access the apartment easily by train or metro.
We definitely recommend the apartment and will not hesitate to come back if we come to Madrid again.