They have very well done 20 minute videos online that almost guarantees male erections after taking a few of these. I bought a 30 day supply and followed directions. There was no reaction even though my testorone level is normal. They advertise that they have a full money back guarantee. I have called over 5 times and each time I'm the 4th in line. I have waited for up to 30 minutes most times. I believe that they have pegged my number as I get the same results every time I call. So far, these people are a ripoff until I hear or see differently.