Stayed here for two nights. The hostel was convenient for visiting Rotterdam and we hired good Dutch bikes from the hostel for €9.50 a day. Kinderdjike is about 15km away and accessed easily on cycle paths.
Breakfast was good and the seating area had a relaxing atmosphere, good for chilling out or enjoying a drink from the bar. Drinks were not particularly cheap and though food was served it couldn't be guaranteed at any time.
The hostel was a unique building and the architecture fascinating. Rooms were clean and functional. We enjoyed our stay and found staff friendly.