Despite of some delays (ring bell of the flat is broken), the host quickly answered and we moved in smoothly. The flat is exactly what is described.
The host also had some basic cooking ingredients such as salt, oil etc. to profit from. The air in the flat is quite stuffy and we did not succeed to refresh it despite of open windows.
Nonetheless, the location near rail station Holland Spoor is fabulous and the flat is good for a short weekend trip to Den Hague as we did.