The stay at James exceeded all of our expectations... His flat is perfectly lovely and he gently and discretely leaves you all the space you need. The kitchen and bathroom are equiped with what's necessary whereas the bedroom is small yet very cozy (, I guess one could even leave the luggage in the living room but we managed without) !
The street is really beautiful and not far from a tramstation to Scheveningen (beach & sea) and to the center of The Hague. However, you can easily walk to the city center if you're motivated (2 km).