I have one , the Blackhawk MiniXSF , penetrates well , does a wicked snap cut , very strong point . A contact cut can be quite nasty . It's not really designed for EDC , more weaponized . I would trust it more for prying etc. , than a standard double edged dagger . It's a 0 grind , so in theory could take a wicked edge . A bit of judicious stropping helped mine out a lot . Haven't made my mind up about the concept , Boker and Blackhawk , make reasonably priced examples so it won't break the bank to try one out .
Chris