the first time i used gh was a few years back "non holo" serono kits total garbage, but i hoestly did have a clue then, my guy sai they where awesome, hahaha oh well, then one of my buddies gave a me a half used hologram serono WOW even with only half a kit it made slight changes...then came eruotech again total crap...Jin's right now are the best to me and most available used them for 1 year straight low dose...also tried kexing but again didnt feel them as much, just my personal experience...jimmy58