Our stay in this accommodation was exactly what was required. It was clean, tidy, and in a fantastic location - central to the Sagrada Familia and some local restaurants. The communication between us and the host was good too, they answered my questions quickly which was much appreciated.
However, a couple of things which could have greatly improved our stay would be that on arrival / check-in, we were requested to pay a 'tourist tax' which was not stated in the listing. Although a small amount of 2.75 Euros, per person, per night, it was an unexpected cost we had to pay upfront and thus, not a truly representative cost of the accommodation we had booked, so very frustrating to say the least. Had it been listed, this would not have been a problem.
Also, on our checkout day (11am) the cleaner arrived at 9am to leave her belongings, whilst this was fine for us, I can see this being irritating for others who could have been sleeping or enjoying the last few hours of their stay.
And finally, a book left in the apartment of local tips, great restaurants, places to go and visit or things to do would have been really useful to us. Local information would have been hugely valuable to us. We ended up emailing the host lots of silly questions (are towels included, what do we do on check out, and are we expected to meet anyone at the end of our stay).
All in all, a good trip and a place I'd recommend to stay, but a couple of simple things would have made our experience far more easy / enjoyable.