The flat is a modern, clean home base to have right in the heart of the old town with very high ceilings and fast wifi. There were some local Mexico DF guide books, which helped our daily decision making. Would definitely recommend to a friend who's looking for a budget-friendly spot near the Zocalo.
My only watch out is that there's no way to auto-check in so make certain details are triple confirmed before check in day and to have a way to get in touch when you arrive--my wife and I ended up waiting for 15 minutes on the street at 5am for the host to arrive despite confirming our check in several times before. Shower water pressure was also very low.