Matcha is very helpful in my meditation practice. The alertness and focus matcha provides is amazing. No review can accurately convey the experience of having real matcha for the first time that it is made properly. As I recall, it took me several attempts before I experienced anything other than an almost unpalatable warm beverage because authentic matcha is tricky to make.
It has been a few years since I ordered Matcha Kari’s Ceremonial Grade, but as I recall I only noticed a slight improvement in the cognitive benefits of it when contrasted with First Harvest.
Forget store bought matcha. It is not worthy to be called matcha, and it is a waste of money. It is a cheap imitation of real matcha in the worst light imaginable. I cannot possibly describe the difference between the two because they are as similar as night is to day.