Tom, the thing you can see in that image isn't the lock face, but the unlocking cam; it's a floating/sliding wedge, with serrations on it for grip, which you push back away from the blade to retract the perfectly normal liner lock, which is otherwise inaccessible, because there are no cutouts in the handle scale to allow you to push it sideways with your thumb like in a conventional design.
Definitely a "solution in search of a problem" type of design... the lock does allow the handle scales to be smooth and symmetric, but in the process creates a safety hazard and another way for dirt to reduce the reliability of the lock. To top it off the blade is AUS-6 at 55HRC... needless to say, it isn't a stellar performer in edge retention!
My excuse is that It looked cool, was cheap on closeout and I hadn't become a Spyderholic yet. It's gotten 0 pocket time in the last several years.