My party of 6 arrived after midnight, therefore had to pay extra for late check in (which is stated on site and acknowledged at booking). However, I'm unsure why it warrants a late check in when we were not received by anyone and retrieved the key ourself in the entryway box.
Since we arrived late, I messaged Sérgi the next morning that we were missing a toilet seat on the top floor bathroom (apparently the cleaners did not notify him that it was broken and removed it). Sergi was able to replace it the same day. Fast communication with Sergi!
Unfortunately there was a sewage smell from the basement bathroom (apparently other people have experienced the same issue) that was extremely strong and uncomfortable that my parents had to move upstairs. Once I told Sergi, he offered to compensate an early morning taxi ride to the airport for 2 members of my group - a great gesture on his end.
There must have been a mix up with the cleaners who arrived after 7AM to clean the apartment. Sergi contacted them to tell them our correct check out at 11, but they continued to ring the bell that we just all decided to wake up.
Overall the place was comfortable and in a good location, however the smell in the basement rendered it inhabitable for 2 people.