This was a nice, clean apartment in a convenient, highly walkable area of Polanco. The co-host (Chris) was very responsive throughout our stay and was able to accommodate our group on very short notice, which was much appreciated.
Pros: excellent location in Polanco, a very nice area in Mexico City; host was very responsive; nice gym facilities in the building; clean; good wi-fi connection in the apartment.
Cons: there were a few small items that didn't work (or didn't work well) in the apartment (a shade fell, one toilet didn't always flush). The most bothersome was the water temperature in both showers, which oscillated between scalding hot and freezing cold. Additionally, the king bed in the master bedroom was very soft and uncomfortable. The apartment is also very loud because of nearby construction, though this is no fault of the hosts.
In summary: this is a safe, clean apartment in an excellent location in Polanco, though could use some upgrades/small fixes.