We spent three night's on Derk's houseboat and absolutely loved it. It was clean, fully equipped and the location was perfect, within walking distance of Rembrandtplein square in one direction and the Van Gogh Museum and Rijksmuseum in another. The wifi worked perfectly and was surprisingly fast. Derk is a very interesting guy (a violinist with De Nederlandse Opera company) and dropped by twice to make sure we had everything we needed - which we did. It was a quintessential Amsterdam experience that we highly recommend.