Olaf was a great host and was very kind not to mind all the guests arriving at different times. Lotus was the perfect place for a big group of people with a nice big communal area to be able to hang out together (which you would not get in a hotel). The whole boat was lovely and clean and tidy, the beds comfy and I was very impressed with the power and heat of the showers- 14 people had showers in the space of an hour and lots of hot water! We had an absolute fantastic and unique experience. Furthermore, it was very easy to get there-with just a 30 min walk from central station, and right next to the tram stop. I would recommend staying on the Lotus to anyone coming to Amsterdam in a big group or a family holiday- it far exceeded our expectations- it was just fab!