Carlos' apartment is in a quiet area of Polanco, near Museo Jumex. The building is safe, has a doorman, and the building requires you a scan a keycard before entering - so I always felt secure. There's a convenience store right across the street as well. The apartment is basic but has what you'd need for a few days. My only negative comments would be that the apartment had a musty / moldy smell which hit me as soon as I walked in. I kept the windows open and turned the fan on but it didn't seem to go away for my entire trip. Also, I was working remotely from CDMX and I found that the lighting was pretty poor for Zoom calls, so I don't recommend this for anyone who will be working or taking video calls.