We had a nice stay at Carlos appartement. He and his wife were really hospitable and communication was nice and very fast.
A little malus point is that the bathroom was without a locker - you feel always a little bit insecure before you open the door. But as mentioned just a little point. Unfortunately there were road works in the early morning right in front of our window with huge noise- but of course nothing Carlos can have an impact on.
The appartement is very nice located, just a few minutes to walk to the las ramblas.
We would recommend Carlos Appartement.