Aromasin placed dead last when compared to ade, etc. in a study on lipids. In another it was better. Conclusion is that it may have more to do with estrogen being too low by either or it just depends on the person. Don't know how that has spread across bbing boards based on one study that I've seen while others say the opposite, etc.
this
there is also a study showing a huge IGF decrease with aromasin, plus one that shows no IGF suppression with adex and letro
in the end its probably all the same and sides depend on how much you wreck your e2...
aromasin is very inconvenient, half life is low (not sure about the 9 hours though, the actual half life of the drug does not mean "half life" of estrogen suppression since its a suicidal inhibitor) and bioavailability is lower if you dont take it with a fatty meal...
and its much more expensive.
adex and letro are cheap as fuck, more convenient and imo - stronger.
im not quite sure if any aromasin dosage would suffice for high test dosages (1-2g+)
i use 1.2mg adex or letro a day for 2g test... would probably have to gulp down 50mg aromasin for that