Penelope was a great host, with very good communication, provided all the info needed and flexible regarding arrival time. Her apartment is also in an excellent location! Quite close in waking to Chapultepec as well as all the restaurants of condesa and la Roma.
However, a couple things to note - you will have to to climb four flights of stairs to reach the room, and then upon entering the room you are in the kitchen. To get to the bedroom/bathroom you have to go down a spiral iron staircase that is quite narrow - I ended up leaving my suitcase in the kitchen as getting it down would have been precarious.
The bed was comfortable but the sheets were covered in small white flakes, as if they had been washed together with Kleenex or something. Finally, the kitchen roof leaked when it rained, forming a large puddle on the floor.
Overall not a bad option for the price, but I probably wouldn't stay here again given these issues.