Neck carry is an ancient method 'rediscovered' by an industry always promoting new products. Disadvantages are the same restrictions as to blade length carry in urban environs. I wear a Mora on a neck lanyard under my shirt. IT's my PSK companion if I lose everything. More than once I've returned to 'civilization' unconsciously still wearing it and in fact comitting a felony in California <img src="/images/graemlins/blush.gif" alt="" /> The lanyards themselves are a liability. What holds a knife securely also works well on jugulars and vertebrae. I use traditional lampwicking with a breakaway stitch. It's far more comfortable, safer and a ready source of tinder. Blade size will dictate the usefullness of any knife. Some people carry SAKs and are quite happy, so a full tang equal should prove as good if not superior. You just have to apply the same criteria to a kneck knife as a big brother re: skeleton handles, geometry, steels etc. The position is no more superior or inferior to any other carry; hip,crossdraw, boot dagger or backpack. What you are carrying or doing will dictate the 'best' carry. If your present system works fine. Buying a neck knife because it's there is succumbing to the glossy pages of the latest knife magazine <img src="/images/graemlins/grin.gif" alt="" />