Jose's flat is perfectly located. On one side of the apartment you have the Plaza Mayor which is Madrid's main square. On the other side you have the San Miguel Market where you will be able to find any tapas and local drink that you want.
Communication was great, Jose's reactivity was very much appreciated and the check in and check out went very smooth. We were allowed to stay a couple of hours after normal check out time and that helped us doing a last tour of the city without our suitcases.
The apartment is very spacious and even if we were 11, each person had it's own place to sleep. There are 2 bathrooms which is great when you are a big group and the kitchen is modern if you want to cook. There are 2 living rooms, one where you can sit down and eat with a big 8 person table and the other with sofas where you can chill and play cards.
We would definitely book that place again on our next trip, Madrid is a great city and we will come back.
Many thanks for everything Laura, Sandra and Jose !