We had a very nice week-long stay in this property - myself, my wife, our two children and one of their partners.
The location is excellent for the sites of Barcelona - many things including Sagrada Familia and Cathedral are walkable - and transport links are brilliant.
Area itself was generally quiet but there was good night life nearby.
Property was nice - first floor apartment. Large bedrooms. Two bathrooms. Very large seating/dining area - we spend many an evening in playing games as a family. Perhaps property could do with a bit of maintenance as some things were broken/worn/damp.
Mar (property owner) seemed nice although we didn't get to meet. Some of comms were a bit aggressive (over noise) or not forthcoming (we had a bit of a panic over the "stay away tourists" campaign) but generally very good.
Barcelona itself is lovely. We have visited before and really enjoy it. Beach, culture, mountains, entertainment it has it all! There is obviously a bit of undercurrent of issues at the moment but in general people we met were very nice and helpful.