We've been there for a week and we did the check-in with Marcel, an Alberto's friend, who was super nice and friendly, we met Alberto during the last days of our stay.
When we arrived we didn't find the best cleaning conditions (mainly in the shared places because we were sharing the house with another couple for the first two days) but Alberto made sure to correct everything as soon as we told him about those problems.
The position is super close to the center of the city and you can reach any place in the center by foot. It's also convenient because it's close to the metro station L1.
Overall a nice experience.