Staying at Christian's place felt very comfortable and homey. Located in a historic Art Deco building, the apartment has a combination of modern comforts and the quirks that come with historic architecture. The only issue you may have is the four flights of stairs, as neither elevator is in service. You'll get a good leg workout each day :)
The bed was clean and comfortable, as were the bathroom, kitchen, etc. Internet is fast and reliable and the location is perfectly central to many locations around CDMX, and mere blocks from Bellas Artes and Torre Latinoamericana, which is the main view from the bedroom.
Christian and his assistants were extremely quick to respond to messages and accommodate any request (I was most thankful when they brought up a huge jug of water, which I would have found impossible carry up that flight of stairs!).
I would absolutely stay here again and highly recommend.