Great apartment, located just a few blocks from city centre and almost everything you should visit in Madrid. Apartment is perfect for 4 people, though up to 6 is possible to stay there.
Hosts are very very warm and welcoming. Anything but a honest recommendation is not possible. They had prepared everything tourist would need when comes to a new city. They even had a "book" specially made for guests in which you can find the recommended things to visit and restaurants to eat according to their's preference. Brilliant thing as you can see the effort they have made.