I stayed at Guillermo's flat to attend a conference being held in the Hilton Reforma which is accross the street. I used the swimming pool in the building which was very nice, as well as the dry cleaning service and food store on the ground floor, very convenient. Location was ideal and Guillermo was very welcoming, even arranging to have my business cards printed upon arrival. Flat is on the 10th floor in the South tower of a huge apartment building which means you need to walk a bit before reaching the apartment, but it is all worth it. I had a very comfortable and safe stay, and do not hesitate to recommend this place.