David´s boat is a very extraordinary Amsterdam living experience :) We liked it a lot! You can have a tea or coffee and sit outside and it is a very pleasurable houseboat all in all. The heating works fine and the shower gets hot, too. You can walk to the city center, take a bus or just rent a bike to go there. There are supermarkets close by and the famous brewery in the mill also. In summer, you can go to the Roest beach bar which is only a few minutes walk away, too.
We parked at P+R Zuiderzeeweg which is convenient but a bit expensive (48€ for 48 hours but that seems to be the norm in Amsterdam).
All in all very recommendable!