The basic description tells you the essence of what this is. You get on the bus either outside Schiphol airport or at a site in the centre of Amsterdam. We got on at Schiphol. The bus looks pretty much like any other tourist coach, and inside it is pretty much the same as any other coach you have ever been on. The seats have decent leg room (I'm 6ft 9 inches, so this matters to me!). The coach drives into Amsterdam - it's a pleasant enough drive, and our driver (with a magnificent moustache, sorry, can't recall his name) gave an entertaining commentary in English as we drove along. After picking up more passengers in the centre of Amsterdam, the coach drives to a the water's edge fairly near NEMO - and then drives into the water. For anyone nervous - the entry into the water was not remotely alarming and was done at a sedate pace.
After that, it's very similar to a trip around the canals on a tourist boat. The only difference is that there are no stopping-off points. The taped commentary, if I recall correctly, was in Dutch, English and German (however, the web site will be able to tell you more on that sort of thing). It was pretty much run of the mill commentary. Then out of the water, a brief stop at a set of shops, and return trip home.
Was it worth it? A large part of the attraction is novelty - people do tend to gather round to see the bus going in and out of the water. If you have a stop over in Amsterdam and only have a limited time to see Amsterdam, I would say that you could do far worse than take the Floating Dutchman. If you in Amsterdam as a tourist - it's fun but not essential.
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