The check-in office to pay the tourist fee and pick up the key is across town from the apartment, the apartment itself is located on the fourth floor (no elevator) of steep and narrow stairs, we found the apartment in slight disrepair and cheaply maintained compared to the photos (paint had peeled all over the floor of the bathroom, no soap in one of the bathrooms or detergent for washer) and it very loud (neighbors weren’t quiet despite all the signs in our apartment threatening extra fees if any of the neighbors complained about apartment guest noise).
What really tarnished our stay was the unprofessionalism of the management staff with the maintenance issues. The bedrooms all have windows that open into the short hallway to let the AC in (meaning you have to chose between having a really hot room or privacy) and one of the AC units was making a loud drilling noise every few minutes (even when turned off). We reported this immediately to the staff as it kept us all up throughout the first night, and communication was slow at best at getting any help from the management office. The day before we left a maintenance guy showed up unannounced in the middle of the day (fortunately one of my friends had stayed back to take a nap) but spoke no English and apparently ended up turning the breakers off for the AC, washer, and fridge. Again, despite multiple messages to staff throughout the day, no apology or explanation was given and we ended up not sleeping well again in a sweltering apartment.
Highly recommend finding another place to stay in Barcelona, this place is not well maintained and I would not trust Key Inn Barcelona (the management company for this Airbnb) to be responsive.