Javier is a great host, very friendly and he answers mails very quickly.
(Thanks for infos "how to reach the apartement" and the infos about food stores and so on)
The apartment is not very large but it is in a great location and it has plenty of room for 4 people. (space is well used). Everything we wanted to see in Madrid was possible to go by foot. The apartement is fully equipped, very quiet and clean and a supermarket is round the corner.
wifi could be more stable but it's ok and it's fine that it is available.
We enjoyed our stay in Madrid.