I spent a week in this apartment with other three friends of mine, and this have been our experience:
Pros:
1) location: 10-15 min walk to Plaza Catalunya, 5 min to Arc de Trionf (metro station) and the North Bus station; the area is quiet and safe, not too crowded neither desert, and it's full of little shops, minimarkets and locals. Not far away there is also a centre for covid tests, so that if you need to do it you don't have to go far away (it's called Servitest, we would give you the advice to reserve your test because is always pretty full).
2) The kindness and availability of the staff for payments and check-in.
3) Fully working TV, Wifi, air conditioner and washing machines
Cons (which aren't real cons, just a couple of details):
1) Cleaning in the bathroom might have been a little bit better
2) The light of one of the bedrooms didn't work.
Bonus point: this is probably the only apartment of this central area of Barcelona which accepts people under the age of 25, without discriminating anyone only because of their young age (we were all 18/19 years old), and we really appreciated it, as we were seriously struggling finding an accomodation for our holiday in Barcelona.
Overall a good experience, recommended!