I'm going to guess it's working well. I'm going on 61, and can't remember the last time I had to get up in the night to wee. I always sleep my 6-8 hours in a single stretch, and can drive 300 miles without ever stopping. The last time I had any experience what BPH might feel like was in my mid-forties. I also have the same full head of hair I had in my teens, and have been growing it out long for the last year. It is very thick and uniform. Since progesterone is one of the most potent 5-alpha reductase inhibitors there is, I am going to make the guess that it is helping keep my dihydrotestosterone levels very low.
I periodically take the estriol simply for the mood effects it creates. It gives me a very rosy and sensuous feeling that I sometimes crave as a balm to my otherwise high free testosterone level. I would rather have weak estrogen binding to available estrogen receptors, since I am leery of promoting over-exuberant cell division at this point in my life.