It's $699 for the base stock, extra to get colour-matching accessories (cheek pad, etc) if you don't go with black. I went with black.
I don't know how well it shoots yet; it's gonna be 14-16 weeks before I get mine.
That said, however, besides looking awesome, the stock significantly improves accuracy, especially on standard M14-style rifles (like my M1A standard). It uses titanium lugs for a positive locking fit between the barreled receiver assembly and the stock. The stock itself has a precision-machined aluminum skeleton on the inside, and a composite exteriour. When you place your order, they request your receiver's manufacturer (as well as your barrel type and length), and the year it was made, so they can custom machine your stock to fit your receiver and barrel precisely.
The upshot of this is that there's no bedding required; whenever you disassemble and reassemble, everything locks in place with adjustable tension for a perfect, repeatable bedding between the rifle and the aluminum skeleton of the stock.
For non-bedded standard rifles like my M1A, it should drastically improve potential accuracy.