Our host Miguel was incredibly responsive on our 4 day stay in Madrid. From check in to check out (and beyond) he was just a whatsapp away. The location was in the heart of the Opera/historical district with great restaurants, supermarkets, and attractions all very close (even a convenient sim card provider directly in front of apt for phone needs).

The apartment hosted 10 of us with little difficulty, a combination of kids and adults. The mattresses were hypoallergenic and so comfortable one of my friends asked the host where they bought. The building has an elevator and the design of the apartment is modern per the pictures.

If you are going to Madrid and want to be close to it all and have a big group, this apartment will not disappoint.