I bought from KUK last week. It was my first time trying Kratom, and i took a 2g dose of Gold Bali ...it was fricking amazing! Never felt so energetic yet so calm. I cleaned the entire house like a pro and then went for a 12k run. No joke, this stuff is a game-changer. There was no jitteriness like with modafinil sometimes. I'm going to try the other strains in my sample pack later in the week (going to stick to twice a week max), and i'll never go over that 2g sweet spot. I might even try less!