This is a VERY nice flat - I would say, it's even nicer then the photos can tell!! We (a couple) have been there for only two nights and will definitly book this flat again when we come back to BCN!
It has a very convenient location, Piia welcomed us very friendly and helped us with our bulky luggage, and the WiFi is fast and steady :-)
The balcony is really nice, the flat is quiet, and the elevator is very convenient after a long day of walking through the city.