This apartment is very nicely situated, outside of the overly touristy parts of Barcelona, but with good transport links to explore the rest of the city, and right next to a supermarket and some small tapas bars.
The flat itself is comfortable, in particular the sofa bed which is very spacious! We had a very nice stay; however, the flat was lacking in a few basic amenities and had some faulty/broken equipment.
In particular, no oil was provided, and only two rolls of toilet paper (for 5 people staying 5 days). The upper shelf of the dishwasher kept falling down and was rusting in places, two of the gas hobs did not work, the cafetiere for coffee was broken, and the shutters in one of the rooms did not close properly.
With all that said, I would still recommend this flat for groups/families looking for a cheap stay in Barcelona - it is a generally comfortable stay in an excellent location.