My best experience ever with an AI was with Myokem Alphadex. I ran at least 3-4 bottles (not in a row) and always experienced impressive body recomp and it was a very potent product. Truth be told, I have ordered it since their “comeback”, and I couldn’t even tell I was taking anything. I didn’t even finish the bottle...
Letrone is also extremely potent. So much that I never get past 5 days or so of takin 1/2 to 1 pill/day. Vascularity comes out very quickly though, as well as strength. I just get too lethargic, and it also upsets my GI system a bit.
Inhibit-E seems solid, and has some nice effects. Much more subtle though in my prior experience..
I wish I had the chance to have tried Virtus, the reviews for that are certainly quite stellar!