I stayed at Federicos place for six nights. Everything went great since I arrived, the directions are pretty simple to get there by metro, which is only two blocks away.
The room was spacious and clean, I was provided with all the facilities I needed. On the plus side you can get coffee and cookies in the morning.
Overall I'm happy with the room, I felt safe in the neighborhood although I didn't get out much cause at night it got pretty bleak . Only thing is if you want to sleep till late I think there's either a huge family on the next building with babies or a preschool. Other than that is well located to get everywhere by metro, there's also a mini market right across the street. Federico also booked me the taxi for when I leave since my phone had no service. I was a female solo traveler (not that should be important, but considering safety) and I didn't felt insecure at any time. I highly recommend it.