It's in a great location, a few minutes walk from Sagrada Familia. The balcony is nice, the couch & beds are comfortable, the bathroom is clean, and the kitchen is stocked if you want to use it (we just used cups). It also has an elevator which was nice since it's ~6 flights of stairs. The elevator is small (fits ~4ppl max, 2 with luggages) which is probably normal for Spain but not for us Americans!
We didn't know at booking that there would be an additional fee per guest per day to be paid in cash at arrival so be sure to read the fine print! We didn't get charged this fee at our other AirBnBs so we were a bit confused, but luckily we had some euros on us. It gets very hot in the bedrooms during August because the AC is only in the living room. There was a small language barrier & a hiccup at check-in, but nothing major. Overall, we had a good time here in Barcelona