Lourdes and Hector were awesome. They were very friendly and we had a great vacation. The room is small, but we didn't mind at all since we came to visit the city, not the room :)
The location is more than great, and would totally recommend if you want to be close to shops, public transport, beach and city center.
The only minor thing that you should know is that there is no real window in the room - but the hosts have that covered with a smart AC + vent that allows for decent air circulation.
If we ever visit barcelona again, we will definitely try to stay at Carrer del portal nou again :)