Well, I'm just over 4 months into this process and I am continuing to see improvement in my hair. I still have not cut the top of my hair since the beginning of month three and am struggling with whether or not I will.
For about 2 years straight now I have been giving myself 1/8 to 1/4 inch haircuts every 2 weeks because that was about as long as I could tolerate it before the thin appearance drove me nuts. I'm now a month in without cutting the top.
My wife and I are both in agreement that my hair has already returned to approximately 2009 levels. I'm on vacation right now but will try to get some photos up in the next week. The crown thinning has been dramatically reduced and I continue to see reasonable improvement in the front as well. The only side effect that I can reasonably report at this stage is a decrease in the frequency of morning erections. I still get them, but not as often as before. My ability to maintain an erection, performance, and libido appear otherwise unaffected.
Plain and simple; my hair is growing back!