I stayed for 3 nights at klaas place with my boyfriend. We had a great time in Amsterdam at klaas house is really easy to find with a great access to the tram, the tram comes every 6 min during the day. The room was clean and cozy, a comfortable bed and a clean bathroom. Klaas is really gentle and a good host. He explains you all the necessary things you need to know for your stay. In front of the tram is a supermarket where you can get some water and bakery for a day trip and it's not that expensive as in the city. I would fully recommend the place.