from my experience adex .5 ed works great on reasonable doses of test when you get above 800mgs wk you might want to get on aromasin if you are stacking other aromatizing gear definitly go with letro with the question of reversal you need to get on letro asap when it happens for better chances of revesal. I dont like nolva for the reason it dosent help with blocking estrogen through out the body it just protects certain areas in my opinion go with adex .5 ed or over 800mgs wk aromasin letro if your stacking aromatising gear.