TL;DR pretty close to popular expat areas but still in a nice, family neighborhood. Good wifi; was easy to work from "home". Clean. Comfortable. Safe. Sometimes a bit loud which could trouble very light sleepers. Kind, responsive host.
Jorge's place was wonderful! Everything was just like the photos; the terrace is a great place to have a drink or read a book or work on your laptop; and the hammock is a good place for a book or a nap. Jorge was very quick to respond to any questions I had (always within 30 minutes) and was nearby if i needed help with anything. The water pressurizer in the shower was a game changer, and the water filter in the kitchen was very handy and saved a lot of money from having to buy bottled water. The apartment is in a neighborhood that feels very homey and safe but is very close to a lot of museums and more "tourist-filled" areas so sightseeing (or finding people who speak English if your Spanish isn't as strong as you'd like) is very easy. There are a lot of dogs in the area so if you're a light sleeper maybe bring/buy some earplugs because there's some barking early/late that could be troublesome for you. The wifi was strong. I was able to work seamlessly from "home" during my 5 week stay, and if you want a change of scenery during the work day there are a lot of cafes within a 20 minute walk. I was there during rainy season and the only time i had a problem with wifi was the day after a HUGE thunderstorm, but Jorge responded to my message for help in less than 10 minutes and the problem was quickly fixed. The apartment is the perfect size for 1 person or a couple, but if you're traveling with a friend or two it may be close quarters. Would definitely stay again and have already recommended to some friends who are still in CDMX!