We did not have a good experience with ElPilar. Main reason is that we were unable to enter our apartment in the middle of the night and that no one answered the emergency phone number. The apartment can be entered in two ways: with a physical key, and an electronic key (code). Upon arrival it was already clear that the electronic Nuki lock wasn't working properly: a note next to the door said to pull firmly while entering the code. After trying a few times we managed to open the door, but later that night when 2 of our group of 4 came back and wanted to enter with the code, the door simply did not open. This was at 1AM and after trying over 50 (!) times, we decided to call the emergency number as provided in the check-in email. No one answered the (Spanish) phone number nor responded to the text message I sent. Also no response on the AirBnb chat. In the end, we managed to get a hold of our two other friends who had the physical key and they had to come back in a taxi to open the door for us. We waited over an hour in the middle of the night.
The fact that we couldn't enter using the code was clearly a lack of maintenance and a risk the host was already aware of given the note next to the door. I asked twice if someone could please come and fix it asap, but no one came. Also, we did not even get an excuse. The only response I got was a question whether we managed to enter the apartment. I find this very disappointing and unacceptable.
Next to that, the apartment is rather noisy, especially the room adjacent to the communal stairs. Also it lacked some proper (winter) blankets: we got some very thin blankets while it was freezing outside.