Rijk is a great host. Me and my parents, we spent six days in Rijk's house planning to visit the most important Dutch cities in the period. It turns out to be a good ides: Rijk's house is in a perfect location, very central (3 minutes from the Binnenhof, 15 minutes from the station) in a very lively neighbourhood (also full of nice restaurants). Both Amsterdam and Rotterdam are within a hour, which makes it feasible to travel there and come back in a day. We stayed in the top-floor room, which was tidy and clean, with a private bathroom (also very clean). The room is on the top of a quite steep staircase, probably be the only slope you will find in the Netherlands :)
We did not have access to other parts of the house, but we had all we needed for a very rich breakfast in our room (fridge, kettle, toaster and a great amount of food). The room was maybe a bit hot during those days, but I guess this had to do with the anomalous heatwave we found those days. I would definitely recommend to stay in Rijk's place!