Overall: This was a wonderful experience. It's very close to the beautiful historic center of Mexico City, bus stops right in front of the house, trains nearby, and great food all over! If I go back to Mexico City I'll check to see if this is available!
The room/house: Great value for what you pay. The room is clean, very efficiently set up, and has everything I needed. I was traveling very light and wasn't missing anything.
The host (Marco): Marco is a kind and amazing person, great host, very responsive, very knowledgeable, and a fun guy. (I was late to check-in and he was able to arrange/accommodate that.)