Arimadex definitely works well as an AI, but Aromasin is definitely superior in many ways and why it is always preferred. Aromasin is lipid friendly, is a suicidal inhibitor, lowers SHBG, increases free test, increases libido, and controls estrogen much better than arimadex.
Aromasin all the way. In addition to it's AI and lipid profile effects, it has also been shown to increase IGF1 in muscle fibers!!!!!!!!!! Plus Anastrozole is more of a suppressor than an actual inhibitor.