I have ran several ph's and most of them made me feel like shit... Helladrol was the only one that I went through the entire cycle until the last week (and that was my fault because I ran it longer than I should have) and did not have sides... I felt horrible the entire cycle I ran with ultradrol which is basically superdrol and all the others just did not make me feel like I want to feel on a cycle... You are supposed to feel like amazing on cycle... Helladrol provided the cleanest gains, with minimal sides so that is what I will always recommend... You can get drastic changes with others but I just don't find it worth it for how it makes you feel...