This layout is quite nice if you want a single small room with decent privacy and don't mind a set of house rules (depending what you're into). You can't have guests over and you have to be quiet during certain hours of the night so as not to disturb the owners or tenants. This is all fine but not normally what you'd expect from a "hotel style" stay - however, the price is cheap so you should expect some tradeoffs.
Maria and her husband are extremely friendly, accommodating and attentive. It's much like staying with relatives you've traveled to see for a holiday.
The location was right in line with my preferences because it is south of all the gentrified "Confresa" tourist junk while being close to a lot of the cooler real local Mexican culture you can find immediately on Bajio, both the Romas and and more west near Escandon.
I would say overall this is a great place to stay to figure out what you're planning to do in CDMX without killing the wallet and wanting to see how locals actually live. Super bonus points for being on the same quadra as Don Frank tacos (one of the best places in the city IMO) and being super close to a great Sumesa just west on Bajio if you like buying and cooking your own food.
This is a simple, cheap, quiet safe stay that I would recommend for anyone interested in a simple living situation.