I'd wait a year until the price drops, but as soon as it hits 300 instead of 3,000 dollars I would be IN.
Lets see... six inches in two months, that means I could grow three feet in twelve months. That would take me to ankle length in a year, and growing that fast there'd be no chance of splitting faster than I could grow.
On the other hand I can't see spending 18k to grow my hair to ankle.