Our apartment was really nice and just perfect for our visit (2 couples) in Barcelona. The kitchen has everything you need and a washing machine is available. Cindy, our host, is very courteous and I could contact her whenever via whatsapp if we had a question.
The only drawback was the booking procedure over sweet inn. The payment could not be done completely via airbnb as the additional costs (vistior's tax) had to be paid separately. A app needed to be downloaded for check in. however, the app is really nice as it is a digital key.
If you want to visit Barcelona, this place is a really nice apartment, where we felt very comfortable :)