The hosts were very nice. They took their time with us and gave us some good tips. They helped us with our queries throughout our trip. We were fortunate to be able to witness the catalan referendum movement during our visit and hear our hosts views on the same. However, we were also unfortunate, as there was a strike during that time and our hosts were helpful and gave us some updates on transport, etc, when we inquired them.
The apartment is 20 minutes off the main city centre by metro and is in a residential part of town, close to a school, so its quite noisy during the day. The apartment is advertised as it comes with a rooftop pool, but upon arrival we were told that the pool section closes by end of september and hence we couldn't use it. So please check with the owners if you would like to use the pool first as this information isnt specified in the advert. No point paying a premium if one cannot use a service.
The appliances and plumbing in the apartment are quite noisy as well. One can hear the water pipes across the whole apartment whenever someone uses the toilet or bathroom. Aircon makes some weird noises as well. Aircon is present only in the living area, not in the bedrooms. The bathroom door has no latch/lock.
In other airbnb's I've used, I've paid for basic cleaning which includes the cleaners throwing out the rubbish. Here, even though we get charged for it, the tenants need to do it, else they take some of your deposit. (I didn't mind doing it, but the request felt strange)
Overall, although the owners were nice, this wasn't value for money, considering all the above. For the same money, you may get an apartment in the city centre and save some travel time during your barcelona stay
Cheers