Only had a miscommunication for check in. I provided details and rough estimates on when I'd be arriving into BCN airport. Upon arrival, and calling host that I'm at the Airbnb. He was shocked and informed me he was unavailable. The resolution was quick. Waited an additional 20 min on door step, and hosts friend welcomes us in. The friend then becomes the point of contact, and I never directly meet the host on listing.
Other than that, the listing was great. Apartment was just as the pictures described it to be. Within 15-25 min walk to most places, or close to the metro to get you where you needed to be. Location has a few good nearby restaurant with a unique vibe, delicious food, and affordable prices.
I came for Mobile World Conference, and would book again as it was sufficient.