The Riwaka flavour might be like coriander that tastes soapy to some. I think Riwaka is a great hop, but it must be dosed appropriately. I recently brewed a Nectaron + Riwaka (2:1 ratio in both hot and cold side) and a Superdelic + Riwaka (also 2:1) and found them very good, albeit if I had to...