I love the strong tea flavor in these sticks. I drink a lot of powdered tea mix (Lipton, 4C, Nestea, etc, plus many brands of boba tea mix), and most sticks can only be mixed with about half a cup of water; more than that and the tea flavor tastes watered down. These sticks still taste nice and bold with a whole cup of water. However, when I use a full cup, the sweetness level is pretty light. Still tasty though.
Like most teas, it's an underpowered alternative to coffee. I had one at 9PM and still had no trouble sleeping. But that's a good thing because I can have it any time of day!