I bought this because it was on sale and have been traveling since, so have not had a chance to use it yet. However, I've used the beginner series (FULL DISCLOSURE: I didn't purchase the gold and silver elixirs, instead I saw from the ingredients I had most of the essential oils in my little essential oil collection, purchase the few I didn't have, and made my own mix.)
My husband got into them at all, wasn't hard to sell him on using them, as he has a receding hairline..
The result from our homemade versions of the gold and silver elixirs for a tiny fraction of the cost (initial purchase of the oils would be an investment if you don't have them but you can make batch after batch with them!) ... Results were very positive. I've seen my hair around the hairline where it's been thinner the last few years, now thicken up in the last 3 months and my husband is happily brushing his thickening hair too. I got him a simple natural boar brush from the Walgreens around the block...
Anyway, the products work, thank you for the idea. I wouldn't try making the advanced elixirs because the ingredients are more rare and harder to find.. But if they are as effective as the gold and silver recipes I made, then they are worth the investment even for a DIY babe like me :)