I started using Latisse after losing all my hair during chemo. After doing my eyelids I would brush a tiny bit on my eyebrows too. People are raving about my eyelashes now and I'm only using it three times a week.
Since I started with virtually nothing it took the full six weeks but they are unbelievable. They have never been so long and thick in my life. I'm on this stuff forever. I have never really had eyebrows but they are starting to fill in too even though it isn't for eyebrows. Very happy user!