Oscar sent me before the travel, some suggestions on how to make the stay in Barcelona, which was very nice of him.
The apartment is spacious and has a historic feel with a wonderful painting on the ceiling. The bathroom and the kitchen are all refurbished. It has hot water heating, spacious refrigerator, electric stove, washing dishes and washing machine. I stayed, only for short time, so I did not cook or use the washing machine, but for those who stay longer would be very helpful. It has air conditioning, but I have not used it, because it was not so hot.
The neighborhood is very quiet but close to metro station Uquinaona and Catalonia. It is also near Rambla and historical area of Barcelona. There are some good options for breakfast and restaurants nearby.