The place merits a 6th star. It's beautifully designed, very well equipped, and has an extremely proactive host.
Some practical hints:
+The bedroom is very quiet as it is on the backside of the building. I mention this because the noise level and window insulation are often a problem in CDMX. This place is the best I've had so far
+ The Peruvian restaurant El Mercadito Peruano down the street is a great casual option
- You can't get the bedroom really dark due to the roof window
Enjoy your stay! I was very happy and will return soon