It was a very good choice to stay in Anas and Miriams apartment.
There was a very easy communication with them. They were flexible with my checkin. My flight was delayed by few hours and there was no problem to reschedule the checkin.
Appartment itself is located close to Atocha train station, so you can take Aerobus from the airport directly there.
The place is really big. It was only me but i think easily up to 5/6 peapole could accommodate - they have 2 sleeping option couches in the living room and double bed in the bedroom.
Kitchen is great. I love to cook and of course I spend a lot o time in the kitchen there. Great space with a dining area and all kitchen appliances that you need.
Highly recomended.