We've had a great time at the apartment. Upfront communication was amazing - there was so much information given about the apartment, the area, the city, ...
Also, checking in (and out) worked smoothly and our host was sooo nice!
The apartment has everything we needed and is equipped beautifully. Also seeing the city is really easy with the apartment being located in the nicest area of Barcelona anyway (as per my opinion) and the next Metro station is super-close.
Walls are a bit thin, but neighbours have been respectful.