I stayed in the 8-bed girls' dorm for three nights with my friend. Overall I was pretty satisfied.
Bad things: The hostel is a little hard to spot- you literally have only above a 2 inch "hostelworld" sticker on the door to identify it. Also, the bathrooms, kitchen, and linens weren't the cleanest in the world. They weren't necessarily super nasty, but it was definitely a reminder that we weren't staying in a hotel. In addition to that, people tended to come in at like 3 in the morning and be very loud, which woke us up each night.
Good things: The staff is quite friendly, English-speaking, and there is 24 hour reception. They have a locked luggage room where you can store your things, or lockers (though you need your own lock for those). The beds are reasonably comfortable, and the hostel is very close to the metro and the Sagrada Familia. It's also extremely close to the Girona airport and about a 20 min taxi ride to the El Prat airport (it only cost me 20€ to take a taxi all the way to the airport, which is pretty reasonable).
And I don't think anyone is going to argue with the awesomeness of free internet!
My experience overall was positive, and There's a good chance I would book there again if I ever return to Barcelona. However, I definitely wasn't "wow'd" by my time there, hence the 3 stars. Not bad but improvements could be made. read more