Thanks for the feedback I'm glad you are enjoying the product!Seems to be the first negative review I've run into. It had to come sooner or later, lol.
For me, it works just as I expected. Same as the original, but without the energy boost of caffeine.
How much water did you use? I find most powdered products to be more effective with less water. The official instructions say 6-8oz, but 4oz seems to make it a bit more effective for me (with or without food, doesn't make a difference to me). I prefer with food, since I'll get the runs sometimes if taken on an empty stomach.
You can also try downing a half serving, then 20 min later, slowly sip on another half serving throughout your mental session. This seems to prolong the effects for me when I'm studying or doing homework.
And last, have you tried adding 2-4g of with it?