Our stay with Sergio wasn't our best AirBnB experience to be honest. The apartment itself is very nice, a good size and in a very good location. Its very close to the metro, bus routes, a supermarket, other small shops and various restaurants. Communication with Sergio is was a little difficult as he doesn't seem to use airbnb to send or receive messages, but he was very quick to respond through phone calls or whatsapp.
Unfortunately for us, the check in process was what really let the place down. We arrived to the apartment being slightly unfinished in terms of cleaning, with the floors not being cleaned, the table very sticky and greasy and a bucket of dirty mop water left. We were also quite unhappy that when the cleaning lady returned to finish, she unlocked the apartment and let herself in unannounced, despite the fact we'd checked in already, which we found completely inappropriate. Even if a note had been left to say she was coming back it would not have been a problem but we were not happy that she just let herself in with no warning.
Overall, Sergio's apartment is fine for short stays in the city, particularly as the location is good, but there are definitely quite a few improvements to be made to provide better service.