Martijn's boat was perfect for our group of 14, with four rooms having en suites and several other bathrooms to share, it made the whole stay much more comfortable! Martijn answered all of our questions ahead of time and was super flexible with the check-in / check-out time. The boat has so much character on the outside and is wonderfully modern on the inside. The central space was absolutely large enough for us all to relax together and eat around the tables.
The ferry to central station goes every 10 minutes and it takes just 15 mins and you're in the city centre.
It's extremely sturdy - we stayed there during Storm Eunice! I can't recommend this boat enough with a large group staying in Amsterdam.