We had a wonderful stay at Heleen's! She welcomed us very warmly and also showed us the "hot spots" of Amsterdam that we had to go to. The room is really nice with a seperate bath room, which also was comfortable. The apartment is within walking distance from a nice, big park and the museums (such as the Rijksmuseum, the Van Gogh Museum and also the Royal Concertgebouw), also it doesn't take you long to go to the city center (it's even possible to walk ;-) ).
The booking and check in ran smoothly and uncomplicated. All in all a nice apartment and a very nice host (who also speaks German! :)) - recommendable!