It will definitely harden you up. As for being an aromatase inhibitor: I found this article written by Pogue. It is about M5aa but M5aa converts to mestanolone (MDHT) in the body anyway, so it is relevant.
Methyl 5AA
Another methylated version of an older prohormone, methyl 5AA should be a similar match to Proviron or Masteron. This compound will make a conversion to Methyl-DHT in the liver through the 3bHSD enzyme. It should be very well suited as a preworkout stimulant, as well as reducing the effects of estrogen and SHBG on a cycle. Since DHT acts as an aromatize inhibitor, it can help reduce circulating estrogen on a cycle in lieu of typical anti-estrogens such as Nolvadex. Oral DHT has also been shown to bind to SHBG, allowing for more of other more powerful androgens to attach to the receptor, allowing for an overall more anabolic effect.