We stayed at Guillermo's fantastic flat for three nights and would have stayed longer if we did not have obligations to leave the city. The apartment is roomy (for a loft), beautifully decorated and well appointed, in a very handsome and safe building. The location is very close to excellent restaurants, bars and cafes as well as the city tourist bus pick-up and (importantly) Chapultapec Park. The wifi is excellent. The rooftop lounge area is not to be missed; it provides beautiful views of the city. The flat also has an outdoor sitting area that is quite pleasant in the morning for coffee (which Guillermo also provides).
Guillermo is an excellent host, both attentive and funny. He met us at the curb, provided helpful and relevant recommendations on places to visit and to eat, as well as advice on catching a bus to Valle de Bravo. He also left us a couple beers and a large water -- a nice touch after a full day of travel. We highly recommend Guillermo as a host. We will stay here next time we return to Mexico City, hopefully soon.