The apartment was exactly as described and was a decent size for the five of us and had a nice layout. It could get a bit cold (in January, for us Aussies) but soon warmed up with all the radiators switched on. There was no TV (I think) but that did not bother us. The wifi could be a bit slow at times - probably caused by the kids watching videos on it.
It is a great location. Just a minute's walk from the Poble Sec metro station. Also just a few minutes walk from a long street lined with tapas bars, and other restaurants nearby. There is a supermarket just across the road. If you are feeling energetic, it is about 10-15 minutes walk up the hill to Montjuic to the various museums there.
Luca welcomed us personally and was very friendly, making various suggestions for places to visit (bars, restaurants etc).
There was a bit of shouting (NOT directed at us) up and down the stairwell from some neighbours but otherwise it was fairly quiet. Despite being close to the big Avenue Parallel, there was no problem with traffic noise. Poble Sec itself is a very quiet neighbourhood of narrow streets, with almost no traffic.
Overall, we really enjoyed our stay.