Stayed in one of the private rooms with 3 beds (2 on the floor, and one in a loft). Just steps from Motomachi shopping street, and super close to the Minatomotomachi subway station entrance (just across the street). Room was very clean, and I had no complaints about the shared bathroom arrangement. The best part however, is that there is a fantastic laundry place (ストランドリー STLAUNDRY (大型コインランドリー) 3 minutes walk from the hostel that takes card, does a full wash/dry cycle for only 1000 yen.
If you need a place for a few nights, this place is hard to beat.