I would not use proviron as an anti-E over armidex or other inhibitors of aromatese.
" it prevents estrogen build-up because it binds to the aromatase enzyme very strongly, thereby preventing these steroids from interacting with it and forming estrogen"
This statement may be accurate but it says exactly why proviron would be a poor choice not a good choice. If it binds to the aromatese then your body will go into high gear making more and it won't be long, usually 4 weeks, before you need to use twice as much proviron as you started with and it keeps going up.
He doesn't talk about the incredible amount of hairloss many guys experience while using it.
He has an interesting explanation as to why it's not anabolic, however most explanations I have read lean toward it not binding to the AR in the muscle but binding very well to the AR in the brain. Which is why most guys think that that fat old cleaning lady is doable when they take it, buy they don't grow.
Overall I think it's a very well written and accurate essay.
BTW, You can have my Proviron when you pry it from my cold dead hand. I love it for tren cycles in particular.