I have the mixer for two and a half years, and now I have my second time to replace the blade unit, not because the knife was dull, but because the flanges attached to the bottom, are driven by the gear motor and bring the knife drive , is made of cheap plastic and again broken. The first time it was still a case of warranty, now is the replacement part whopping cost 15 EUR, almost a third of the price of the machine. Because I feel almost like before when Printer & Co. The machine performs conscientiously perform their work as long as it is soft and liquid. Vegetables are pureed literally. Ice, even and soft nuts (such as walnuts) and perhaps sugar cubes! can not stand it, because it throws the plastic tabs away. By the way, I also think that the first stage too violently gets going, 5 levels are merely window dressing anyway. The small differences between two stages would have been enough. But that would be a marketing perspective just not as fancy. I'm considering now whether I buy the expensive spare parts, which then also holds back a year or prefer another device, in which I will look immediately after receiving under the blade unit. Is it made of plastic, the thing comes back.