I used to have a hand blender of the stick type http://www.jmldirect.com/Power-Blitzer-With-Cook-Book-PP5125/
It was pretty good except the coupling teeth were made of plastic and looked prone to fast wear especially if someone hit the power button by mistake before engaging the coupling. After about 6 months the inevitable happened and I came home and the coupling had become a molten lump of plastic.
Does anyone know if there is a brand of blender of this type that has a metal coupling connection. It seems to be the most obvious thing that manufacturers are creating a built in expiry in these tools.