I own the device now for over a year and use it often. Mainly I mix drinks with fruit, but I use it to crush, for example onions, nuts or vegetables (salads) - it works flawlessly. Neurdings "raking" the device, however, more and more and will not start until after I have adjusted it again. After I looked at it more closely, I realized that the plastic connector (red part) and knife deformed slowly but surely between essay. This is tantamount to the connection at some point so shaky is (and the two parts is no longer mesh) that the device will no longer function. I think that - at the price - a weakness, especially since the problem through metal parts might have been avoidable (instead of Palstik).
