A good place, safe area, reasonably quiet, with hot water, and a responsive host. I booked 10 days, then extended for another 6 days. I would stay again.
One problem: someone needed to meet me at check-out, so that I could hand the keys over, and they were 22 minutes late.
Sounds: when I first arrived, it seemed loud, from street traffic, and I was dismayed. But the master bedroom, at night, is very quiet, though not quite silent. It was silent with my earplugs. There is little or no noise of footsteps above.
Safety: it's fine. I never felt unsafe even at night. It's a classy and busy area.
Kitchen: decent. Mostly I boiled or microwaved things,so I can't say anything about the frying pans. No oven. The fridge has a water reservoir.
There is a porch which has a clothes watching machine, detergent soap, and lines for line-drying your wet clothes. No drying machine.
The second bedroom has a chair and table, I did most of my computer work there.
Water: Amart is literally next door, and sells all sizes of water bottles; go toward the back to find 5 and 10 liter bottles.
Food: Wal-Mart Express on Rio Balsas is the best supermarket experience nearby, though there are closer stores that are more limited. Rio Tigris and Rio Lerma has a Mexican-style indoor market. The restaurant El Huequito has the best tacos al pastor.
The shower was hot and high pressure, but the hot water turned lukewarm after around 5 minutes.
There is an elevator which works; also the room is on the 2nd floor (ground, 1st, 2nd), I usually took the stairs unless I had luggage or water jugs with me.
You do not need keys to leave the building. (Some buildings in Mexico City do require a key to get out.)
Ramon quickly provided another fan when I asked for one, and more garbage bags since I went through a lot.
WiFi: decent. Not super fast but video calls were fine. Sometimes it dropped for brief periods.