We (6pax) had a very great stay in Barcelona in this apartment of Jose and Patricia.
Due to a delay of our flight we arrived very late. Despite of our late arrival (after midnight), Patricia arranged a warm and friendly welcome. She took all the time necessary to explain how everything worked out and how to get around in Barcelona.
Our mean priority is that an apartment is clean and tidy. This apartment was cleaner and tidier then the most 4*hotels! Also the bed linen and the towels were very clean and smelled nice.
Furthermore, the apartment is situated in between two metro stations from which you can travel to the city center in just a couple of minutes. The Sagrada Familia is just a 5 minute walk. From here you can take the tour busses throughout the city. A big supermarket, restaurants, coffee corners etc are just around the corner.
At last, we bought too much drinks and food so we decided to give it to the concierge. He was very, very happy with it. Maybe something to keep in mind.