We had an easy time finding the place. Its located in a quiet very nice neighborhood with a bakery almost right across and a couple of authentic cheese/cold meats shops. Local mini supermarkets are also within a block or two. Pizza Restaurant is just few steps away. It is a ten to fifteen minute walk to the Sagrada Familia from the appt. The host was very nice, accommodating and welcoming. The place is very clean and has all you need to feel at home. Me and my husband are always picky when it comes to bed mattresses but they felt very comfortable and we all had a good night sleep. After our long flight from LA that was quite important.
Also, we left our laptop in the appt in a hurry. (Yes, still can't believe it.) Carlotte, one of the hosts, was so nice to meet us few days later (after our cruise), very very early in the morning to give it to us on our way to the airport.
Overall, we had a good time and will definitely come back next time we are in Barcelona.