If you want to try the three-step system, it's much cheaper to buy the package which contains this product along with the shampoo and conditioner for just over fourteen dollars here on Amazon. I bought the shampoo and conditioner at Whole Foods but they don't carry the Emulsion product. The shampoo and conditioner don't seem to add any more body than any other shampoo or conditioner on the market.
The Emulsion product comes in a fairly small bottle which won't last long if you use their recommended dosage. As far as I can tell, it doesn't make my hair noticeably fuller. Hair gel would add more body for far less.