So I'm gonna buy an ECA(Y) stack on Friday and was wondering which one is the best one for results? There are alot to choose from online and alot of them look the same, just small price difference. I've read alot on here about the stack from SEN so was thinking of buying that one, but saw one that was the same minus the Yohimbine and was cheaper and had more doses, so basically does the yohimbine really make a big difference, and if so what is the recommended stack to buy?? Thanks in advance.