What I liked:
- nice and compact design: despite this being a "one room" apartment, the layout is such that it has a "multiple room" feel to it. For instance, from the bed, you don't see the kitchen area.
- the small balcony. Even though I could not use it, due to bad weather, this is a rarity in Mexico City
- very very quiet, as the apt is in a building at the end of a small alley
- good location: easy to get by foot to nicer areas of Condesa, and proximity to main Sonora Ave and Durango street makes it very easy to get a taxi
- tasteful design, high ceilings (also a rarity in Mex City)
- good HD TV
- Sando was a very forthcoming host, and also flexible as regards arrival or departure times.

What I liked less:
- the apt is poorly insulated so you hear almost every step (and voice) of the neighbours the floor above
- if you have a car, access to the garage is quite difficult due to the location of the building, so if you thought of renting a car: get a small one.

Overall: highly recommended for a couple or single traveller.