While the location was great for this AirBnb (convenient location close to metro, lots of shops nearby, quiet building with lift, close to museums), I would not stay here again due to many issues below. This could be a great place to stay, but Diego has some work to do.
Cleanliness:
Only one bath towel and one hand towel per booked guest were provided, no instructions were provided to let us know what to do with our trash, and the radiator in one room leaked (which wasn't mentioned to us) and had a bowl of water under it which needed to be emptied every half-day or so. Without the bowl it would leak onto the wooden floors and make bad smells. Duvets were unwashed and uncovered (no duvet covers) from the prior stay. The cleaner left the linens from the prior stay in the Airbnb for the entire duration of our stay.
Accuracy:
Described amenities not available. No house manual.
Communication:
Staff working on behalf of Diego were not at all knowledgeable. While Diego was very responsive via airbnb chat, he was not via phone - the phone number he listed wasn't even for him, but a service company with little knowledge of his unit, and we did not receive a call-back from Diego after leaving a voice message about the cleaners. Check-in was listed from 16:00-20:00 "Guaranteed". We were told day-of to arrive promptly at 17:00, no earlier, no later.
Check-in:
We were not allowed to check in at listed time. A "friend" of the host met us and the home was not ready for check in. Beds were unmade, pile of dirty linens were in the hallway. Host sent a linen delivery service (with no instructions on how to let someone into the building) who did not take the dirty linens and delivered 1 bath towel per booked person (for 8 nights!!) as well as not enough sheets to make up the three beds. We contacted the host who sent a cleaner to the home to make up the beds, who arrived angry and yelling, stomping around the home for nearly an hour and acting as though we were the problem. Phone call made to the host regarding the problem was not returned. Dirty linens from the last guests remained in the home for the entire stay, while we fearfully awaited the unannounced return of the angry woman. Duvets in the bedrooms had no covers and were unlaundered from previous guests. We had a long flight to Madrid and just wanted to rest, however we ended up waiting about 2-3 hours before the house was in a state where we could take a nap.
Positives: The flat is conveniently located with a short walk to the metro. A quiet and secure building with a lift. Kitchen provided ample amenities. A quiet section of Atocha easily walkable to markets, shops and museums.