This flat is GREAT. Right in the city centre (a 3 min walk from Plaza de Catalunya, and you can easily walk to the waterfront too) and near a lot of shops, this is the ideal location in Barcelona. The Gothic quarter is very charming. The host is very welcoming, the communication was very smooth, and I really enjoyed my time here.
The flat is even more spacious than in the photos, and the terrace is very big and ideal for meals outside, working, or just chilling. The internet is fast, though the wifi doesn't reach one of the bedrooms and the kitchen. I have stayed in a LOT of long-stay airbnb's, and this one is definitely on the podium. Enjoy your stay!