Debora's friend Maria Carmen was very accommodating with our check-in and check-out despite her tight schedule. Although Debora wasn't there herself, it was easy to communicate with her before and during our stay.
That said, she should have warned us in advance that building rules strictly forbid to use the air con/heating machine from midnight to 8am (we had passed on another flat precisely for that reason!). Luckily April's weather this year was neither too cold nor too warm, but it would have been an issue pretty much any other month.
Other than that, the flat is quite close to the city center and was very clean, with good Internet.
The main problem is it's not soundproof at all. We always travel with earplugs, but it wasn't enough: bells ring incredibly loudly right next to the bedroom window from 8am, and there's also a lot of noise from the street at all times - even very late at night, especially on Fridays and Saturdays (people shouting, cars honking...).
The shower also needs fixing (no water pressure) and the kettle is leaking; too bad because the flat itself is ok.