All in all.
We really enjoyed the apartment in Barcelona. It fits perfect for two couples or two persons. The apartment was clean and Xavi welcomed us late in the night, which was super easy. The terrace is awesome. We had breakfast every day on the terrace and were able to invite some friends for some drinks in the evening.
You can walk 10min from the apartment to the old city of Barcelona. Gothic usw...
Right in front of the apartment, you got a beautiful park, called Ciutadella Park.
For a grocery store, you just have to go around the corner and you find everything you need.
So, thanks to Xavi and Luna.
The apartment is nice.