i'm just going to go ahead and throw my .02 in here...
i had HORRIBLE experiences with Tren E .... i shedded for weeks and weeks after i quit tren. I lost a significant amount of hair while on. It was super depressing...
With that said, everyone is different, and if you ARE prone to MPB and ARE worried about hair loss i would say STAY AWAY.
In my case, i was lucky and got my hair back with a little finasteride but most people aren't.