I just snagged this at the Berea Gun and Knife show. I love the concept and the product is every bit as nice in fact as it looked to me on the interwebz.
For those that haven't seen or heard about this, it does not use a torsion spring. There are two counter wound extension springs with a chain drive. The torture tests on this knife are extreme and impressive. Well over 100k openings before even a minor malf and the knife was still functional.
Here's a nice review and there are several youtube videos of the torture tests.