One of the reasons we carry so many different types of Kratom is because it seems like everybody is "wired" for a specific strain or type. Extracts are no different.
We have one person who works at TKK and has always been unaffected by pretty much every extract that came along, no matter how strong. But we knew we were on to something when this one reached him.
Keep in mind, that doesn't say anything about its strength (although with recommended starting amounts in the range of 1/2 gram to 1 gram, it's plenty strong) - Simply that this is a unique formulation which will most likely resonate with most people. Give it a try and see for yourself. We think you'll be as pleasantly surprised as our guy was.