Nice apartment with everything you need. We used the kitchen and the washing machine. We didn't actually see Pau, but he was always there for us via the messenger of AirBnB. Getting inside was no problem and the old elevator works just fine.
There are two rooms, one with a double bed and a small room with a smaller bed. Perfect for a couple with one child.
Bus stops are right next to the apartment. The beach and metro stations are a few blocks away. We often walked to Marina metro station from where you can get to most destinations. You will find a lot of tourist information in the living room and Barcelona is one of the best cities I've ever been to.