We had a wonderful stay at Esti's apartment! It's a cozy spot on the top floor of a beautiful building near Puerta del Sol. Esti was flexible on our arrival and met us later when our flight was delayed. And this location is amazing if (like us) you want to be able to walk everywhere. We especially enjoyed the Mercado de San Miguel and wound up getting drinks and tapas there almost every night. Highly recommend this place!