Well these Riptropins are kicking ass, got on them a little over a week ago. And I can tell you 4iu's of this feels like 10iu's of the blue tops and about 6iu's of Maxitropin. 6iu's and I couldn't even close my hands in the morning. It gives me crazy insomnia for some reason like when I was a kid and I feel wide awake even if I get only 5 hours asleep. Great product, I may try kigs later just to compare, but I can definitely tell you guys if you have access to Rips do not even hesitate to get them!