I had one in my wallet for a little while. I never really found a practical use for it. I always had a folder clipped to my pocket, so that was the one I reached for. I do remember that the blade was the sharpest knife out-of-the-box, I'd ever owned. It looked really cool with the carbon fiber, and it was of very high quality. I miss it, but not overly so. I sold it to a police friend for a significant discount. Now I carry a Titanium card with sharpened edge. It's much thinner and lighter, and serves it's purpose just as well.
Daniel