We had a great time staying at Yaiza's place. The location couldn't be better -- close to Plaza Mayor, many of the museums, lots of cafes and restaurants, and a large 24/7 supermarket right down the street. The view out the lovely windows is of the little neighborhood cross-streets, and the apartment is light and airy and quiet.
Check-in and communication was swift, easy, and helpful. The rooms are not as large as they appear in the photos, but it was certainly roomy enough for our needs.
We would absolutely stay there again and will recommend the place to others!