The flat is in an entire building run by the apartment company than rents these out on Airbnb. The communication is excellent, they are there to help you out with everything you need and super-flexible. Allowed us to leave our bags in the flat for an extra two hours so we could nip around Seville.
The flat itself it smaller than it looks on the photos and probably not ideal for small children with the high staircase. Totally fine for adults though!