Because I've ran primo several times and honestly I'm not a fan. Ran it up as high as a gram a week and well... other then loosing hair at an extreme rate really never felt it was worth the money. Now I tried a few different labs I trusted and who knows maybe i never got real primo who knows since it's often faked. But it's no longer on my roster of compounds I'll take.
One of the reason I rather suggest a test only cycle for the first cycle is if you start mixing other compounds and have no experience how do you know what is doing what. Specially with no experience. Try test only first and then at least you have something to base your next experiences on.
Everyone is different
Some people think EQ sucks but I think it’s amazing
But honestly a gram of primo should yield tremendous results in most when it comes to net muscle gain that you can keep.
There are exceptions such as poor genetics, lack of rest, shit diet and training