I just spent an amazing long weekend with my girlfriend in Roberto's apartment and would highly recommend it to anyone visiting Mexico City. The location really can't be beat. The apartment is on a quiet street directly across the street from a park in the best neighborhood in Mexico City (IMO). There are countless bars and restaurants within walking distance. Roberto was a great host and went out of his way to meet us upon arrival and share his excellent neighborhood tips (Rosetta, Puebla 109, etc.) even though we were almost 2 hours later than expected. I would definitely stay here again.