It's a relatively cheap flat compared to other rental flats in Barcelona, so it is hard to complain.
Its biggest advantage was the washing machine and the proximity to the Guell park. There were also no noisy neighbours and the neighbourhood in general seemed safe.
Also the owner is a very friendly man and the whole service was remote.
The biggest disadvantages were the living room window overlooking the street and the overly aggressive air conditioning (the temperature setting didn't work properly and it was blowing too much, so we turned it off at night to avoid catching a cold, but it wasn't very nice to sleep with the open window and the noise of cars and rubbish trucks outside).
The windows of the other rooms overlook the staircase, which is quite surprising, and also makes it quite dark.
The building is located on a hill, which even for people who, like us, walk several kilometres a day for their health, can be tiring, especially when returning at 12 o'clock at night, after 10-12 hours of sightseeing and intense walking.
A boiler failure meant that we had no hot water for 3 days out of 5 but it can happen everywhere.