The houseboat overall was indeed very nice.
The location is quite convenient. It isn't in the centre but it has 2 tram lines close and also 2 buses.
The house is beautiful and clean. We totally recommend it since it is a different experience to wake up on the river with ducks etc outside your window.
The most important is that you feel it like home. We would like to stay there when we will re-visit Amsterdam.
The only negative thing was the check-in hour (after 16.00) which didn't bother us as we arrived later, but could be inconvenient for someone else. Nevertheless, maybe after talking to the owners this problem could be solved.