Gerard is one of the best hosts I've had in my many years of using Airbnb. His flat is amazing - beautifully furnished with a lot of personality, spacious enough that you can choose to have time to yourself or be in a communal room, and a wonderful location near metro, major bus lines, cafes, restaurants, and much more. Also, being on the top floor (with elevator) and having a terrace let you take in views of the neighborhood, Montjuic, or just the sky at any moment.
Gerard made sure I always had everything I needed, both in terms of the flat (blankets, towels, wifi, etc) and also for traveling around the city. His flat is well organized and tidy. I highly recommend staying this listing for anyone who is visiting Barcelona and wants to do a mix of touristy things AND non-touristy things. It's the full, welcoming Barcelona experience.