Samuel and his girlfriend are nice people, very friendly, always were ready to answer all our questions. Apartment is outstandingly clean, perfectly located in 1 min walk to metro station and 15 min walk to the heart of Barcelona (La Rambla and plaza Catalonia).
Check in/out time is completely flexible. Samuel let us leave our luggage till 11pm of the departure day.
If i happen to be in Barcelona, would stay at Samuel place again, unless he disagrees :-)