We did not see the owners of the flat, only their cleaning lady, who was there finishing tidying up. She was pleasant and helpful with the key-box issue, which I had misunderstood. We did not contact the hosts either, as there was plenty of info inside the flat. The flat itself was well equipped and comfortable, although it would have been nice to find some tea, milk, mineral water, etc., rather than just the single pot of nescafe. A detail but nonetheless in need of fixing: the shower "holder" is broken, so one has to manually hold the shower set, which is a bit annoying if you want to relax in the shower after a day walking around the city. The area was noisy until the early hours of the morning (4-5am), but we were there Friday and Saturday nights, so I think this is quite normal for Barcelona and there are certainly much noisier places and far less well insulated appartments.