Fabrizio and Mariana were absolutely wonderful hosts. If you're a laid back, adventurous traveler type, you will definitely get along with them right away like we did. They provided us with a great breakfast every day (Fabrizio cooked two days and got us tamales on other) and the bedroom/bathrooms/everything else was neat as a pin in a cute little apartment space. We hung out with them at a pub, too, and enjoyed great conversation about what things were like in Mexico. It was neat to get Fab's take on things too, since he's not from Mexico, along with Mariana's native perspective.
Only warnings I would say are be careful on the stairs, as there are a couple flights to go up and some are steeper than others (my partner fell once on them; we're not kidding) - and at night they are unlit. It's not Fab and Mariana's building though; not their fault.
Also, if you are a light sleeper, the windows in the bedroom get quite bright in the morning. It woke me up pretty regularly at 7am or so. Not blindingly bright, but definitely noticeable. Not a big deal since it was nice to hear the birds chirping but you might want to bring a light blocker mask.