Ok, I read this and have ordered one..... hope you are on commission from Amazon!!! I do actually have a cheap one which works fine until I put it into liquid and then it slows right down and would never do a shake....
They don't compare with my blender but are much better than those shaker yokes and at least I don't have to shlep my hand blender everywhere. And it fits in my handbag! Bonus... I can bring it to coffee shops etc and just ask for a pot of hot water now