Our group was there for a weekend for a music festival, and overall we had quite a good stay. The boat was just like described in the pictures and the airbnb listing, apart from the wifi not working. Grietje was a very friendly host, gave us information about surrounding area, and we even did a small boat trip in an Amsterdam canal/river on the last day. Staying in a boat has some peculiarities (like if too many people shower around the same time, you might have to wait a bit for the water drainage to be pumped out), but overall we found it's a good choice of accommodation for a large group. We would stay there again.