Reading other reviews about Francisco's properties, I felt as though I could not go wrong choosing one of his places. His other reviews are great. And I was right! Let me now add my voice to the chorus. :D
Francisco is a great host who has some fabulous suggestions on places to eat and things to see and do. I received a warm welcome. Francisco speaks excellent English which was really appreciated given my appallingly bad Spanish and especially after 27 hours of travel. His response time was fast for my enquiries before and during my stay.
The apartment is small and basic but comfortable. The water is hot and the water pressure was fine. The shower head is a shower rose (not a handheld shower). The WiFi was consistent in the apartment and in the shared areas (eg. the rooftop and foyer where I was able to order an Uber). The mattress was harder than I'm used to but still comfortable enough. A giant bottle of drinking water (10 litres?) was provided. The kettle is hidden in the oven. BYO tea and coffee. There is a washing machine on the rooftop which takes coins only (about 20 pesos. Hint: load your laundry into the machine before you put the money in. You will need your own laundry detergent. Make sure you collect coins in your travels. I found trying to change notes into coins is difficult in the shops around the apartment, even when purchasing things). The doormen were lovely and we had fun exchanges even though I didn't speak Spanish and they didn't speak much English.
As a solo female traveller, I felt safe in this apartment and in this area (I was cautious heading out at night but didn't experience any problems). It was busy during the day but seemed almost deserted on weeknights.
The location was great, just one block from Templo Mayor from which Zocalo is a few minutes walk further. It was a 20-30 minute walk to many of Francisco's dining recommendations which are more in the centre of Centro Historico. In the other direction is the Mercado de la Merced which is the largest traditional food market in CDMX.
I am happy to recommend Francisco to any prospective guest. :-)