i have used both gakic and luekic. for my money I like luekic better than gakic. but the do say for the best result is to stack the two. I just got done with my last bottle of luekic i liked it for the most part. but i was also taking it with bns No-Xplode ultra creatine burst, Muscle milk protein shake. and gnc amino acids. so with all that shit i better put something on.