For me it was perfect as a solo traveler! The room is separated by a long corridor from where the owners live, so I’ve had an impression of living in a separate apartment, you hardly see or hear anyone.
When booking I was a bit worried to disturb if I go out late, but the room is just next to the entrance door so no one could even hear me coming back!
Alex also let me put my luggage in the apartment in the morning before the check-in time do that I could freely move around the city.
So highly recommend for someone who is in Barcelona for work or pleasure and just need a place to crash!