This apartment and building was a great find in CDMX. It was within walking distance of most of the popular tourist spots in the city, which was another great thing. The area can get a little loud earlier than expected in the morning and stay loud until late in the night, but that's a given when you consider the area you are in. If safety is a concern, you don't have much to worry about -- the building is under 24 hour security and there is a large police presence throughout the city. I never felt unsafe at anytime for what it's worth.
I didn't meet Tristan, but I did meet his mother over the course of my stay. Both Tristan and his mother were great. The few times I needed something, I never had to wait long until Tristan replied to me. I would definitely stay at any of Tristan's listings in the future if given the chance.