I noticed significant slowing of hairlose after around 3months of use. Where I noticed it most was that my hat wasn't littered with nearly as much hair as before, and instead of combing 40-50 hairs in the shower, I now am only combing around a dozen (sometimes as little as 2-3 it may seem or sometimes 20).
I still have had a few sheds on and off, but over all it seems to have slowed/stopped my hairlose, at least compared to the rate it was going before. I have to say I caught it pretty early, and my only lose was a bit along the hairline, but it seems to be working.
Alas, no regrowth along my hairline yet (nearly 8 months in), only a bunch of nasty miniturised beasties taunting me at the moment (little fuckers, they can read this I'll bet). I don't hold out much hope in reversing what has already been done, but I'll give it a nother year or so and maybe just add rogaine foam to the little areas affected so far and see if I get improvement.
Peace...