Very convenient location with most of Dublin in walkable distance, especially if you do touristy stuff, but even areas across the canals are walkable within 45 min. Good bus connections to the airport and both Heuston and Pearse station are less than 30 min walk.
Extremely friendly staff in the hostel (cleaning and reception staff was very lovely) and friendly people at the pizzeria next door for which there is a discount. Due to the location it can be noisy at night so bring your ear plugs.