Before trying it, I did some research online... and I found several reviews that complained that, while this product was pretty amazing, the bottle seemed to be faulty and most of the product would leak out after the first use. Eventually, I decided to try it out anyway. And, well, my experience pretty much echoed the reviews I read at the time-- it worked great at de-greasing my roots, but the 2nd time I tried to use it hardly anything came out at all.
However, tonight as I was looking for a link I found some newer reviews on drugstore.com from the past couple months and they claimed that their bottle last through several uses, so I'm tempted to go buy another bottle and try it out again. I think I can spare another $5 on the hope that they'll have fixed the leakage problem.