Erika and Sabina's guest room in their design studio was very nice. It's very charming-- cute for Instagram-- and you absolutely can't beat the location and price. Just to note, the building is old so floorboards are creaky and the walls are thin; you can hear everything in the other rooms and courtyard. If you're a light sleeper, I recommend bringing earplugs (luckily I did). There are 2 bathrooms which was convenient for sharing but the sinks in both of them didn't have hot water FYI. The mattress was on the firm side and had a thick down-feather comforter, which was great since there was no heat and it got chilly at night.
Erika was super responsive when I had questions regarding checkin and also issues with the shower in which she promptly contacted a plumber. I appreciated her willingness to find solutions quickly. I was traveling alone and felt very safe there and in the neighborhood in general. Lots of cute cafes and restaurants in the area, street market, supermarket, and very close to the metro and other touristic spots like Chapultepec park. Erika and Sabina made me feel very welcome, thank you for the wonderful experience!