I have been four times to Barcelona and I know the city inside and out. The location of the apartment is great. 10 minutes to the La Rambla and 20 minutes to the beach walking. It is suitable for a family of 5. The host was helpful and responsive and nice. But you have to be aware of the extra charges if you were to drop your bags earlier than the check-in time. It something I didn’t encounter with other hosts ever and I have been using Airbnb for the past 5 years. I had to pay 25 euro in cash for dropping my bags 2 hours earlier even though I wasn’t staying. To the host defense, she told me that earlier. So it is a choice you make.
Other than that everything was great.