We had a great experience staying at Sergio and Victor's apartment (or flat, if you prefer). It's nicely decorated and in a great location for fun nightlife, street scene, the grandiose Paseo, good access to Chapultepec, public transport, gym, and there are several satisfactory places to eat nearby (we especially enjoyed the atmosphere at La Casa del los Abuelos). Victor and Sergio were very organized, warmly professional, clear, and responsive. I would recommend their apartment to anyone that wants a lively weekend (or couple weeks) in Mexico City!