Review (5/5): It's definitely working for me.
I had a severe eczema outbreak on my face for a few months, and it decimated my eyebrow hair. I had NO eyebrows for more than a year. Although the eczema cleared up my eyebrow hair refused to grow back, and I was stuck mourning the loss of eyebrows.
I began using this product about two and half weeks ago, and I've seen the gradual return of my eyebrow hair. It's not a lot and it's not fast, but the growth is there. It's working for me. Note: the product is expensive, and the glass container breaks fairly easily. Especially if you leave it on the edge of your bathroom sink...