We had a very good time at Klaas's place and we can highly recommend it to everyone who prefers staying at a quite place, a bit outside of Amsterdam, which has however a very good connection to the center (20 min by tram which goes every 5 min). We very much appreciate Klaas warm welcome, he gave us a lot of advice what to do in our 3 days trip. The room is small, but perfect if you stay most of the time outside. The bed had a very matress, we thus enjoyed a very good sleep. A coffee machine, a water boiler as well as a fridge and a microwave are available, thus a quick breakfast in the morning sun (if there is any) on the balcony is possible. A nice place for a stay in Amsterdam!