The place is super well located, everything is in walkable distances. Also Marta and Enrique were extremely nice and gave good tips. They were extremely responsive, though we never met in person.
The problems are: we had to search for the keys in a locker in the city (5 min away from the apartment). We had just 2 sets of keys though we were 6 persons renting the apartment. The place is dark and difficult to heat. Last, but not least, no one actually lives there but it is just rented as an airbnb (as it seemed to be the case with some other apartments in the building), which is a pity and helping with the gentrification of city...