Michiel's house is lovely. It is very well eqipped (the table football in the basement was a big hit with our 8 year old) and very comfortable. The kitchen is especially well supplied (having access to a good range of herbs and spices makes a greate difference to cooking at someone else's house), the living room space is big and airy and the shower is lots of fun.
And the garden... The garden is absolutely lovely, not only because of its amenities (including hammocks and a tree house), but also its ambience - it felt very tranquil.
And the local area was nice, with Sheveningen sea fron easily accessible. But it was a bit of a struggle without a car - the local shops are nearly a mile away and while public transport is good, getting groceries etc. would have been a lot easier with a car.
And Michiel was very helpful and responsive both when booking and while we were there. His replies were always quick, friendly and helpful - and what more can you ask for?
Overall, highly recommended.