There are nice things about this apartment, but my stay began stressfully, with terrible communication. The hosts didn't send check-in instructions on the day before I arrived, so that evening I asked what I needed to know. They replied, “the entry is self check-in.” I asked for details, but no one replied, even the next morning after another request.
After 1pm on check-in day they said I needed to access a web site to enter the building. But I was coming from the US and didn’t yet have a phone that worked in Spain. I explained this and asked for another option, and they sent multiple messages ignoring the issue.
Upon landing, I learned that the door can be opened remotely at whatever time the host and guest agree on. Had they told me 28 hours earlier, everything would have been fine. Instead, I was so frustrated it was hard to forgive things like a very uncomfortable sofa, smelly common areas (it's a hostal, not an apartment building), stairs like a ladder, shower that floods, etc.