The hosts are a lovely couple! The check in was very flexible and the hosts provided us with much information on what to see and eat in Barcelona. They are super friendly and accommodating!
The location is central and the flat fulfils the basic requirements, however it is quite cold in the room (no heating available). We were in the city the whole day, so the flat was good enough for us.
If you do a short trip and don't have high standards (as this is someone else's little home, not a hotel), we can recommend this airbnb! :-)