Marie's house boat is exactly what my wife and I were looking for on our quick 3 day trip to Amsterdam. A historic, family owned boat (built in 1901), within easy walking distance to the main train station.
The bed is huge and extremely comfortable. The shower is great, good pressure, good temperature. It can get cold on the boat at night time, but there are space heaters in both the bedroom and the bathroom, and a big blanket on the king sized bed, so that was more than enough to keep us warm.
Marie was very friendly, and easy to communicate with. Check in and check out were both extremely easy. We would definitely recommend staying here.