Julios apartment was perfect for us as a family of four. We got the 200 bus from the airport and only had a short walk to the apartment. Location wise we found it great with the Bus number 53 outside that went to city centre and near Retiro Park.
Their are few restaurants across the road and a supermarket. Their is also a shopping centre only around a ten minute walk away.
Julio was a great host and always responded promptly. The apartment is as described. The swimming pool was great to have to cool off and the kids loved it.
I would definitely recommend his apartment and hope to return on our next visit to Madrid!