My report after 2 month's of useage:
First of all, these bottles don't last a month. I just finished bottle Number 3 after exactly 2 months. And yes, I've been using one ml each time, more or less.
Second, my hair is somewhat long and shaggy, and has been from the beginning. So it's difficult to gauge any visual progress. But I am a "Norwood 3 vertex", so my emerging bald spot and receding hairline are all quite noticeable. I would certainly notice any real gains in hair.
That said, I have noticed two major changes. First change is that my hair does indeed seem to be stabilizing. Some random thick terminal hairs are poking forth from my hairline. Shorter than my real bangs but thick and noticeable. Perhaps a centimeter long. They may have already been there, but generally my hair feels like it's subtly more substantial. Full disclosure: Propecia worked great for me when I used it 10 years ago in my twenties. However, it took about 8 months to notice much. But after that it was clear I gained a norwood or two.
Second change is that about two weeks ago I noticed I wasn't having very great orgasms, stopped being as horny and had greater difficulty getting and keeping an erection. This is the exact feeling I had from Propecia, and why I stopped. This tells me the antiandrogen goes systemic, which also means it's working. So I assume this tradeoff is going to result in thicker hair after about 8 months, but no great sex. I'm willing to muscle through if this keeps my hair in anticipation of Tsuji, Follica, or something else. We'll see.