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nein, nein, nein!.
Unless you speak german, this is a puzzle to solve. I don't, so I didn't. I am being prompted to elaborate here, but the fact remains - all texts are in german! It shows promise, but you will need a german to english translation unless you are willing to roll the dice and hope for the best.
Pros: Only that the description indicates user-potential.
Cons: Without an english translation, any pros rest on whether you want to gamble on intuition.