Overall a great stay.
Very few cons: Check in seemed to be a bit over the top compared to other stays.
Pros: The stairs were narrow, but the apartment was clean and the perfect size for 2 people. The snacks were also a very nice gesture.
On the second day of our stay there was a problem with the main door to the building during the day and customer service was great. They responded within a couple minutes to my message and sent someone out immediately to fix the door. So this is a great place for two people to visit Barcelona and have everything you need in a truly great location.