I tried this on a whim -- I have been wanting to get away from the plastic bottles of commercial laundry soap, so the idea of this soap tickled me -- reducing waste at the soap factory and also allowing me to reduce packaging waste. I wondered if it would really get things clean, or might leave soap buildup, since it is just ordinary soap. So far I've used it for about 8 loads, using 2 Tbsp of soap and 1/4 cp white vinegar (for rinse) per load, and the clothes all seem clean and odor-free. So far so good!