My sister, my niece and I had a great stay at Sergi's apartment. Apartment was as described, very spacious and clean. The terrace was extremely useful to play some games with my niece. Apartment is very nicely located, close to very nice local restaurants, cafes, shops and subway.
Sergi was also very accessible and helpful through our stay, and key exchanges etc went pretty smooth. He also helped us to book a cab for our trip back to airport.
I highly recommend him and his apartment.