It was sufficient. Ask for a bottom bunk unless you're young and lithe. You will have to make the bed yourself out of the provided bedding. Good view of Vesuvius. Two bathrooms in the room with showers in each. Shampoo provided in the dispenser. Bunks have curtains which do.not.cover the full length, lights, and power outlets. Lockers adjacent to the room, you need to provide your own lock.
The location is excellent, very close to the central train station, shopping, and food.
Luggage storage was great and convenient.
I can't speak to the other listed amenities, as they weren't available. I was told the day room was closed. The office space looked like it was still being renovated and had no desks or furniture. There was no kitchen available, no lounge, no game room. I did see the gym in the basement.
The hostel appears to be an addition to student housing or dorms. The setup appears to be geared to them rather than the hostel guests.
I would stay again, due to the convenient location and cheap cost; however, I would look for other options first. This would not be my first pick again.