Hi All.
We went there late last year, It is very large place with a lot of wonderful displays and the airport deserves special mention with a fully working airport. The planes moving around, docking and taking off. Also the push trucks moving the planes and all the other airport vehicles. The harbour area with real water perhaps 24" deep. With 48" long ships which move up and down the channel. All done by remote control and its very life like. The railways are Wow. With night time scene coming up every 15mins. All the houses are lit up. A very impressive Place. You need about 6 hours to see it all.
Also to think about is the Maritime Museum Hamburg a short walk away which a good place as well.
Prentice.