I had a very nice two-night stay in this apartment. The location was excellent: right next to the Callao metro stop and within walking distance of all the main sites in Madrid. The apartment itself was a great size, very clean, and smartly-decorated. I felt very much at home there. As other reviewers have noted, it is in a very busy plaza (it is sort of like staying in the middle of Times Square) and can be noisy during the day and in the evening. But if you stay out late and use a white noise app on your phone, its perfectly fine for sleeping. Alicia was a courteous host and she met me at our agreed upon time in front of the building. Since no one was staying in the apartment the next night, she also let me check out later in the evening on the day I was departing, which was an especially nice gesture. I would certainly recommend this apartment to others looking for a chic place to stay in a great location while visiting the city!