This one really deserves its 5 star rating. The apartment was well proportioned, tastefully decorated and had all of the amenities needed, all in working order too.
We are inerrailing, staying at mid price hotels and airbnb apt/ studios (7 so far) and this is the best so far by a wide margin. Juan was a great host. We booked late (on the train going) and checked out late, v. Flexible, friendly, showed places to go etc. even put up with my bad Spanish (although has good English).
Location is Sagreda Familia, bang on the placa, with excellent view of the Basilica, although a little way out, still walkable -Barceloneta 45 mins, taxi ride 9 euros at night, shopping area at Passeio Garcia 20 min walk, so not bad at all. I recommend bike hire, v close by.