I stayed in the 12 person, all-girl dorm. It was a great stay! All the girls were respectful going in and out late/early. The beds all have little curtains for some more privacy sleeping. There is an outlet for every bed so you can charge your devices. There are drawers under the bunk beds for each bed so you can lock your stuff up, if you bring your own padlock it’s free to use, or you can rent a lock from the front. There are boys and girls communal showers for each, but they were kept clean and I didn’t have any issues. A towel was provided free of any addition charge for me too.
You also get discounts with the neighboring bar. I didn’t go, but it’s nice that it was offered. Super easy check in and out process since the desk is open 24/7. Great location near Placa Cataluña and the last stop from the Aerobus from the airport.