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We just produced a children book with this technology in Germany:

http://www.amazon.de/Ulff-Backenh%C3%B6rnchen-eine-irre-Verf...

Will be released in the next 4 weeks. It was fun to make, but also quite nightmarish in the technical details. It is a hell of work (we have roughly 30 animations in the book, very small and very big ones). It requires extremely accurate measurements for the grid-foil and a sophisticated workflow and color management.

In the first run, the printer forgot to fixate the ink on the grid-foils with a protective layer, so using the foil would smear the black color.

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