So I've went through about a pound worth of different strains and vendors. I gotta say, for as cheap as it is, kratom is amazing. I stayed llifted for like 2 straight months. It's some really useful and really fun stuff. You really gotta shop around, I mean, it all works. But some batches are just better. When you learn how each of the veins work for you, you can make your own combinations. You can make some the bring you up and others can lay you down.
Check facebook groups for vendors and free samples. I've received over an oz. free in the mail. You can also just ask for them at their websites.