...I have seen some other "test boosters" that claim to lower estrogen etc. But isn't that bad (unless you are on real AAS and need balance) because estrogen = good HDL cholesterol right? Wouldn't taking this crap if it does lower estrogen just f-up your HDL/LDL levels like most oral steroids do? 
I see your point. Even if the products in question
did work as the companies claim, I suspect that they wouldn’t block aromatase forever and your body would eventually get its needed estrogen. The marketing behind these supplements is good because it uses lots of valid facts to form a believable theory - albeit a somewhat non-sequitur one.
I’ll admit that even I bought into the idea that this product would have “some” effectiveness based on my knowledge of the endocrine system. In fact, I believed in it strongly enough to try it myself. Granted, I wasn’t expecting miracles from an OTC product, but I expected more than it delivered, which was NOTHING.
I’ve posted the supplements I have used and continue to use with substantial success. I highly doubt that that list will ever change much.