Had to email 'em to place my order, because ordering through the website resulted in an error. They were most accommodating and very helpful. It was no trouble at all to help me make sure that the order got sent my way.
I ordered 2 bars about a month ago, gave one to a friend who'd threatened to "steal" one of my locks so she could have the scent (and to make sure that it got used, not vacuum-packed and left in the freezer and forgotten... or eaten by the dogs.. who are convinced the tasty smelling hockey-puck sized cake is a big treat).
Anyway, a whole bar lasts me somewhere between three and five months.
I wash my hair ONLY with this shampoo, it's the only one I use.
I use it to wash my hair once to twice a week, depending on how messy it gets.
I plan to place a larger order later, as a number of my friends are falling in love with how my hair smells and how soft it feels, and the simple fact that I tell 'em they can use the shampoo and not "lock up" if they brush their hair and use a non-silicone based conditioner (preferably acholesterolone).