Klaas' place was pretty much perfect. It was very clean, super quiet, and Klaas was both gracious and flexible with us. He went out of his way to accommodate us, and we couldn't be more appreciative. Highly recommended.
The neighborhood was ideal as well. Close to bus line to/from Schipol, and right by the tram stop to go into central Amsterdam. We had no problems navigating and getting around where we wanted to go.
There's also a bakery and supermarket (and other amenities) just across the street, that were super convenient from the house.