Sorry realisation, rule 5.3 applies to this matter so I have deleted some of your information.
5.3 It is forbidden to mention prices of competitor products and accessories in this forum. If people want to know prices of such articles, then please use private messages to each other. We reserve the right to amend this rule at any time, without giving notice. You may however quote prices on food/drink, recipes, and other general domestic products (kitchenware, household goods etc), that do not directly affect Thermomix and it's accessories.
In answer to your question though, I have not heard a good report regarding that book.