I and my family had a very nice stay. The place is large, quiet and squeaky clean - exactly what we needed! There were minor issues with kitchen utensils, but those were fixed in a timely manner.
Just two things to note: the entry is not accessible (no ramp, only two flights of stairs), and the lockbox room might be tricky to find (there is a confusing sign on the hostel door - do not go through that door, the room you need is actually further up the street if you walk from Britomart).