Have I bought this device for making smoothies and I am very satisfied. There are also high-performance mixer for 400euro up, they have a number of revolutions from 30,000 rpm. However, all of these devices have a top made of plastic. The WMF Kultpower per has a glass top and is sufficient for the average consumer from certain. Make daily smoothies. A banana, a kiwi and 8 Kohlrabi leaves with 250 ml of water is mometan my favorite. Is beautifully smooth and completely adequate for private use ....