Negatives: Bathroom ceiling tiles have mold, there are no full length mirrors in the private rooms, internet is very slow, no hooks on door or wall to hang towels in private rooms, hallways are VERY humid with no fans in the bathrooms for shower, there are a LOT of steep stairs. They don’t participate in any typical hostel actives (eg family dinners, bar crawl, walking tours etc) or help you find them. 
Positives: it’s near the metro, plenty of people on the street (even late at night), good tapas across the street, discount codes for all the local attractions in the lobby, free (bad) coffee 24/7, occasional fruit offered at breakfast was so nice to have as a snack (they should ditch the bad muffins & pastry and stick to oranges, bananas, and toast). Good kitchens—very clean!
The dorm rooms looked nice and we would return to them in a group because the prices here are low compared to other spots. But we wouldn’t do a private room here again.