The apartment is in an amazing location (great restaurants, tapas bars, supermarket, Prado museum and the metro literally in front of the door) and you pretty much have three small balconies. Full kitchen and washer/dryer available with all pots, pans, cutlery and crockery.
The issue with the key is simple don’t push it all the way in and it opens easy.
Javier was super prompt with any questions I had and everything was easy. I totally recommend this to anyone planning on staying in Madrid!