Everything was easily to discuss with him, he was very helpful and answered quickly.
The location of the apartment is excellent, everything is so close (Public Transport - buses, metro, train / Shops - Carrefour, Condis, Aldi, Lidl / Bars).
The flat is cosy and designed by very good sense.
We had only problem with the flat's main door lock. It did not open easily, mostly it took some minutes to open.
Generally we are highly recommend the place for staying in Barcelona.