The location is superb, with a great view of Sagrada Familia. The apartment is good and spacious, but grossly understocked - we found no paper towels, no salt, no oil, no tea or coffee - none of the basic stuff you found at most other Airbnb places in Spain or around the world. Providing such items would not cost much but would save unnecessary hassles for guests.
The host gives only 4 hours windows (from 4 pm to 8 pm) to check-in "for free". Otherwise, he would charge at least 30 euros for late check-in. One would only find this in "additional rules" - very hard to see on the listing - you need to find and click a link. Personally, I found this rule to be outright ridiculous. The advertised self check-in was not available. We had to wait 10 minutes to get in, even if managed to arrive within the "free" window. Overall, the host (Albert) needs to work to treat their guests better.