it works..lets say the great jwh18, ur-144 and the 5f was a perfect 10 this 8fa is a 5 at best. It gets you high but not the knock your socks off high you had with the others. Duration isnt long but it isnt short...Sorta like a light buzz feeling before you get really great feeling when drinking. Best way to describe it. Hope it helps. Very low casual high. Damn sure aint worth the 3k or 3.5k china is asking.