The whisks are of poor quality. They bend and twist if touching the side of a mixing bowl while beating egg whites!  This happened 3 times. I have been beefing 3GS for. Ore then 30 years and never had this happen. Instead of offering g replacement whisks Brown replaced the entire unit 3x, great. What a waste and how terrible for the environment.  I now have 3 motor units and 6 kneading attachments and 3 pairs of broken whisks. Needless to say that I have changed brands and now have a hand mixer from a different manufacturer with sturdy whisks