It is very nice experience staying at Joaquin house, and the decoration and facility are all very stylish and comfortable. Joaquin spoke very good English, and he communicated with us very friendly through the whole process. We would highly recommend Joanquin's house to your stay in Barcelona.
Just a tip to other traveller, that when you arrived at Barcelona Sant station, pls take taxi to the apartment which only takes a few minutes. We tried to google the place and walk, but it seems Google took us to the wrong place.