Gregorio's apartment is lovely, decorated with much taste, I really loved the old floors and features, which give the place so much more character than most postings we had seen in Madrid, that looked so sterile and soulless. The size was perfect for us (one couple), it is equipped with everything you need and the location is super central, with easy access to Gran Via, the shops, the subway etc but also the cool neighborhood of Malasana and La Chueca. The only thing guests should know is that it can get noisy at night / weekends because of this location, but we were expecting it and it didn't bother us so much. The check-in and the communications were seamless, I would really recommend this place and come back to stay there.