We stayed at Siems houseboat six nights at December trough Christmas and New Year. We really enjoyed our stay. Siem was not able to come to show us were his houseboat is, but we had really good instructions with fotos from him. Boat was clean and comfortable. Toilet and shower worked very well and place was calm. From Central Station it is very easy to find the place with public transportation. This way to stay in Amsterdam was something different and we totally will come again some time. Thanks to You Siem for everything and Happy New Year!