But Der Verrückte Eismacher is the real thing. It's good. Really good.
I'm not sure I'll ever try the sausage ice cream (but hey, apparently people like to buy it for their dogs as a special treat, and the dogs just love it), but today I had a dark chocolate cherry sorbet that was simply fantastic, and also tried the lemon yogurt and the Augustiner beer ice cream, both of which were perfect re-creations of those flavors in ice cream form.
My one suggestion is to take your ice cream up the street to the Akademie (turn left and you'll see it at the end of the street) to sit on the steps to eat - it's a better spot than the actual shop, which can feel a bit stuffy and claustrophobic.
Der Verrückte Eismacher