Bought it, rather disappointed. I was really looking forward to getting it, too, just to have a wee utility knife that would allow me get stuff quickly and be on my merry way.
In order to deploy the blade, you have unscrew the threaded locking nub. If tightened, you cannot move the blade forward to deploy it. I left it in a position that allowed me access the blade as I needed on the move, and it came apart in my pocket, with all the the tiny springs and parts going everywhere when I pulled out my wallet, gone in less than a day.
$40 for this? I will be reluctant to purchase more of their products.