I used Human Gear for 18 of the 20 years I've cycled and did just fine. I consider mexi-gear Human Gear though so I am putting Eq in that class. The higher concentrations vs the pain, cough, allergic reactions, don't cut it for me. So that's not a reason to use UG as far as I am concerned. I am not going to lie and say that cost is an issue because I never paid for it and I am open about that. So even though I get UG for free I would rather pay for Human Grade just because it's cleaner and more evenly dosed. But the issue of variety is undeniably skewed toward UG. I like Parabolan, I like Masteron, I like NPP very much. So I don't think you can make the choice to use just Human Grade unless the mexi-gear people start to make those products at a reasonable price.
So for my weekly test/deca I use Human Grade and fill in the holes with UG.