The Citi Hostel is a hostel in the centre of Dublin, on a corner of Talbot Street, an area full of hotels. My Erasmus group and I used to stay at hostels during the weekend, as there was no public transport to take us home at night, and it was cheaper to stay in a hostel than get a taxi such a long way. A bed usually cost about 15 euros, cheaper if there were more of us. This time I think there were about 12 of us, and I can honestly say it was the crappiest place I've ever stayed.
The Spanish receptionist was friendly, which is a good point, but that was the only one. If you see the photo, there's a bench with a back patio and a cottage.