J have persisted in use before commenting .... The button is hyperactive hard and we must constantly pressing hard on it to grind. Sometimes small pieces of iron filings form if you moulinez in an iron container style pressure cooker. It takes twice the time and strength to grind a soup than normal. If you long moulinez the mixer must heat because I have strange smell and appliance heats. I'm not demanding in general, but now I'm too disappointed! A word .....