Wow, what an amazing place. First, the location was incredible. As stated in the AirBNB write-up we were close to the Cathedral, Plaza Mayor and Puerto del Sol - all areas that one visiting Madrid would want to visit. The apartment is on a quiet side street so even though you are close to areas with a lot of people you don't even realize it. There are a lot of excellent coffee shops, restaurants and shopping close by. We tried to go to as many as possible.
The flat itself is incredible. There is plenty of space for a family to spread out. All of the kitchen appliances, cookware and dishes are brand new. The washer and dryer are key items to have when visiting for a week. The beds were incredibly comfortable and we all slept great. The couch was comfortable to sit on and was large enough for a number of people to sit on at once.
The communication with the owners was excellent. We had some questions before arriving which were quickly answered.
While I can say the write-up regarding the flat was 100% accurate it was better than we even anticipated.
I feel very strongly that anyone staying here would leave very happy. We loved it.