Everything was great - beyond expectations! First of all, we were allowed to bring our 2 year old son with us, and Rosa was absolutely fine with it, even though he cried in the night sometime and woke up always at 6am and was being loud afterwards. Delicious breakfast, lovely chit-chat and a house full of art... Also it was so central as described, we walked everywhere! In 4 days we collected so nice memories, and everyone of it was with the help of our perfect host. The room was exactly as described, clean and neat, everything you need was easy to find and the bed is comfy even for 2,5 person :)
I would definitely revisit Madrid and re-stay with Rosa.