Got some of this from the Here’s Hoping TTB.
Tossed a bag into a small mug with 90C water yesterday, I believe. It had a bit of an aroma, but for the most part…just tasted like water until I got to the bottom of the mug where the bag was, which just ended up being a mouthful of oversteeped green tea.
Not sure how old these bags were, so I couldn’t really say if I would or would not recommend this when fresh, but I certainly didn’t like the flavor of the tea itself.