I absolutely don't like the heavy Vanuatu Kavas like Stone and FVK Vanuatu. They paradoxically affect me in pretty much the same way. As a recovering alcoholic, the best thing I can liken their affects to is a bad beer hangover. I can't sleep on the stuff, often for about 24 hours, and I get no euphoria. Fiji Waka 100% lateral roots is my type of heavy, and the best I've found is Squanch Waka. It gives my body and mind the velvet glove treatment, and I sleep great on it.