Many thanks to Laura and Rene, they were very nice during our stay. The boat is a very nice and an original place to stay in Amsterdam, ideal for kids (I personally would not take toddlers nor babys because of the water proximity).
The boat location is very convinient, far from the noise, so you are really peaceful while there, but stilk 5min bus ride away from the Central Station or 15 min nice walk.
Very recomended.