The only ones I got anything from was X-Nutrients, I have been trying them on my Butch T and not really noticing any rapid or spectacular growth. Gonna give it another week and if there is no real growth, I am chucking it all down the toilet and finding a new nutrient system to use.
The trick is to send emails out to as many companies as you can. I'd say I've probably sent out to about 30 different companies and received about 15 different samples. Many of those were full product line samples.