No question about it, this is the best place to stay in Madrid! Iaia was absolutely wonderful as a host and was very kind and quick to help us out when we had any questions. It's super easy to get to the apartment (we arrived by plane and took three trains to get there, but Iaia provided detailed instructions and we had no problems whatsoever! The underground is great) and the closest metro is only a few minutes walk away from the unit. The unit has everything you would need, and is beautiful. There is a supermarket right near the metro stop, and it is not a long walk to many of the great things in Madrid! As many have said before, the hand-made manual is a great resource too!