Koni’s place is very well located, you can reach the subway and the bus station very easily, plus the Sagrada familia is very close by walking. It is a cozy and nice flat to spend 3 or 4 days to visit Barcelona. I recommend it, the only issue I can spot is the fact that the flat is a bit too dark and if you enjoy to sleep the morning you cannot really , because there is a school just next by. Apart from that the location is amazing.