I was at Ernesto's place with my daughter. I had to leave the apartment very early in the morning to go to my IB course in an NH hotel. It was 30 minutes by bike and I liked it very much. Madrid is very quiet in the morning because people start to work late. We both adored the kindness of the "Madrilenas". Also Ernesto and Victor from the airb&b were very kind, although I hardly met them. We felt very welcome; specially by all the lovely sweets and attentions in the kitchen.
We will come back as soon as possible (haha), because we felt in love with this place and environment. Our list with recommandations for bars and places to be is already too long. The fish restaurant in the street is very nice and good; specially if you like to share a hugh tower of Gamba's, crabs, langoustines etc.
One thing: next time we will appreciate to have two keys, because my daugther had to wake up when I had to leave early, because the front door had to be closed with the key, because of the dog.