Product review (1 stars): Suggested Alternative to This Washer
I'll save you some money.  Put your clothes in a tub, fill it part way with water so it doesn't cover the clothes, then swish your hand around in the water while making grinding noises.  Don't swish too vigorously so the clothes remain dirty; clean clothes would ruin the effect.  Do this about 4 times and you're done.  If you buy the washer anyway, the only thing agitated will be you.