Very weak... and a hint of plastic?
The sachets come individually wrapped in plastic baggies. For a large cup (say ~16 oz), you'd need 3-4 sachets to brew a tea that wasn't obviously weak. I tried it well before the box's expiration date, so that wasn't the problem. As the tea soaked in the water, it seemed to develop a faint taste of plastic. Not sure where that's coming from. Could be the baggie it was in or the sachet, which is made out of some kind of plastic fabric.