Please be careful when ordering as they will automatically sign you up for refills. The web ordering form is fairly tricky in that you unselect a check box which somehow fills itself in again indicating that you want autorefills. The last I checked, they simply don't give you a choice when you order so be prepared to be on the phone trying to get them to stop. It may be revised now, but regardless, be aware that they will send you more whether you want refills or not. You will then have to pay to send it back.
Alternatively, order through Amazon where you won't get sucked into their ordering system.
The product is based on washing your hair with conditioner without shampoo. It's an interesting approach but not novel. You can do the same thing with Suave conditioner for a fraction of the cost.