Just stopped the one night here on a cycling trip. The staff were very welcoming, and due to a large family booking an entire floor, we had a free upgrade from hostel room to hotel room. For that reason alone they deserve a good review. They were also very helpful regarding our bikes, and we're happy for us to store them in the private terrace, rather than leave them out on the street.
The breakfast wasn't included, but was cheap, and the freshly squashed orange juice was awesome.
Great staff, great hostel, great location. Stay here if you're staying in Rotterdam.