We enjoyed staying at the apartment. It is easy to walk from there to the attractions of the historic centre, like the zocalo, cathedral and templo mayor. The apartment was comfortable and modern. It was a little bit noisy but actually quieter than we expected, given that it is in the middle of Mexico City! The friendly concierge and location on a busy street made it feel safe. We never met Carlos but his emails were helpful and the check-in instructions worked perfectly. Thanks for a great stay.