The Little House in the Garden is as good as the reviews (if not better). The three of us (three generations of the same family) had a fantastic stay. In particular my 3-year old son loved the house, the Garden and the chickens.
This is my 6th visit to Amsterdam and 1st on the north-side. I don't think I would stay anywhere else, the location is fantastic and there are some excellent restaurants and cafes within a short-walk.
Nancy and Hans are fantastic hosts, very responsive to questions and everything is clearly laid out to make the most of your stay.
Highly recommended.