This is really one of the best hostels I ever stayed in. Clean, comfy beds with curtains, nice relax-area, great staff (they help you with everything, even set up a movie night for us). Kitchen is big enough for people cooking simultaneously and there is also laundry for a reasonable price. Its quiet in the night (no party hostel) which is really good if you have to work (or just like to have a good night's sleep ;))
As for the working part: I had hoped for a coworking space with lots of digital nomads. Most people where tourists however and the coworking is mixed with the relax/dining area, which can be stressful for both parties. If I could make a wish: please separate working from living.
See you next time when I come to Barcelona :)