I got one a few weeks ago, and I like the knife, but it just did not serve the purpose I bought it for. The sheath attachment for belt carry is fine for my duty belt (I'm a LEO), but it looked odd, and frankly, my KaBar TDI is perfect for what I need. For a regular belt, I didn't like the way it looked. Very "Urban Commando-ish."
A few days after I received the CRKT neck knife, I bought the La Griffe knife, and that knife was perfect for me. The CRKT neck knife is now on my Warbag at work.
The CRKT knife is beautiful and very functional for a work knife. For the price I paid for mine, I have no problem using it as a tool rather than a self defense knife. The knife is very solid, and grips well. It's not wickedly sharp like my Endura or La Griffe, so I don't know how functional it would be as a box cutter.
I tried carrying it as a neck knife for all of about 60 seconds, and it felt too big and heavy. Perhaps if you were used to "Bling" around your neck, it might not be so bad for you.
All in all, it's a good knife, tool, and would do the job well if your were fending off zombies. Are there better neck knifes for self defense...oh yeah. Save your $30.00 and buy an Emerson La Griffe neck knife, providing you can find one. They are very hard to find, much in demand and not really widely produced. I know of a place in California that stocks them. You will not be disappointed with the La Griffe..