PH's do work. I have done a few cycles myself. However, they are very hard on your liver and should be used in conjunction with a proper PCT. I know that most people start off with PH's (me included). I would always say, "I will would never inject myself with drugs that is for REAL drug users." However, as I became more educated on the topic I found that 1) I was already using drugs; PH's ARE A STEROID. 2) injectable steriods are more safe on the body than orals. That right their changed my mind-the fact that injectables are easier on the body.
FYI-there are sources all around. Just keep doing your research no matter what it is you decide to do. Ology is the best place that I have found to gather information and talk to real people about these types of topics The search button on top of the page always seems to help me navigate through all the posts to find exactly what I'm looking for. Hope that helps!