We had a wonderful time in Barcelona, mostly because of our lovely stay at SweetInn. The location was excellent: it was right by the bus station, there was a cafe downstairs, and is very near convenience stores. It's also a short walk from the supermarket, La Boqueria, and train station.
The amenities were also complete, it even had a washing machine!

And lastly, the interior design was lovely. It was so enjoyable waking up and coming home to our AirBnb unit every day. Good thing we stayed for 6 days - so worth booking!