I agree, I have NEVER added sugar or any sweetner at all. When I first tried it I was grossed out but seeing as I pick habits up easily (and I really wanted this to be one) I tried it again and LOVED the subtle bitterness and hot water feel when you first get it and I absolutely will NEVER go back to coffee after kicking that habit for this one. As well, I don't know if it has anything to do with the green tea but since I've started (my one cup a morning which I will soon be increasing to 5/day) drinking it I've felt more energetic and less tired at the end of the day and have lost 5lbs (again, I don't know id there is a relation) but over all - I love it.
I also don't mind the fact that I can go into Starbucks and grab my Venti (the largest size) Green Tea without worrying about price since size doesnt matter.