No PH experience here whatsoever and I can tell this product is a disaster. I know people who have run these type of things for short cycles (3-4 weeks) and while the results may seem impressive, they lose at least 90% of the gains. Maybe if you used it in the first 3 weeks of a longer 6-8 week cycle you might be able to keep more of your gains, but to run it straight for 3-4 weeks doesn't seem worth poisoning your body for what you'll end up with.
But like I've said, I have zero experience in PHs, so I would take my opinion with a grain of salt.