Stayed here for 5 nights. The apartment was sparkling clean, and the beds very comfortable. Ricardo was punctual at the agreed check-in time and answered promptly for questions that I had. One thing to note though, we almost ran out of toilet paper and didn't see any supplies, so I'd suggest to let Ricardo know ahead of time if you think you will need more household supplies.
Location is superb, you can find very good street food during the weekdays just around the block that cater to office workers from nearby buildings; and also there are several Korean restaurants within a block if you want a break from Mexican food. The neighborhood is safe even during the night, and you can walk to Roma, Reforma, Chapultepec Park or Zona Rosa in no time.
So, if you are looking for a place that has flexible check-out time, good and affordable food options nearby, quiet neighborhood but close enough to the nightlife, and walking distances from important landmarks such as Chapultepec, National Anthropology Museum, and Reforma, this is your place!