The location was the best part of the room. The room was ok, as advertised, except that no windows meant that it would be really stuffy, especially when it gets warmer. Vick, one of the hosts, was nice enough to provide a fan for me so that was much appreciated. The fan also helped to mask some of the sounds by the other guests, they were generally respectful though one girl walked very loudly so light sleepers beware.
The room and common spaces were clean on Sunday, when I checked in and when the weekly cleaning was done but the common spaces, especially the bathroom did degrade, as expected of a shared space. I hope that more frequent cleaning of the common spaces would be done in future. Given that it is more expensive than a standard hostel. The mattress was also very old and worn, a spring even stuck out of the side and I got a cut on my leg as a result. I would suggest that they switch it to a solid foam mattress which would be easier to maintain. There is also severe water damage in the ceiling of the room, which made me rather uneasy though nothing happened when I was staying - the hosts are aware and will get it fixed.
Communication was so-so. I had asked if it was possible for an early check-in or to leave my bags a couple weeks before the stay and not a single one of the hosts replied my messages on Airbnb. I had to whatsapp the one who was supposed to be in charge, only to be directed to another, Vick, who was very helpful and allowed me to access the common areas early and check in rather early as well.
So overall, it was ok, by no means a horror story, but look closely at the details and one would find the gaps. Unfortunately accommodation in Barcelona is expensive and they priced themselves well so, details are the price to pay for this stay.