Lock is really tough and sharp - I had to use file to make it bit more comfortable for my thumb (similar problem I had with Buck Strider Tarani). Thumbstud is also sharp and too close to handle is not comfortable eather, sometimes I fail to open, because blade is quite locked in the close position. Of couse if I pay enough attention I never fail, but this does not happen with other knives. Other Kershaw I have always have perfect mechanics. Probably this is rough like real military equipment.
May be I am a bit dissapointed also because on the TAD Gear website it was 4 3/4" CPM154 blade, but it is actually 3 7/8" CM154.
Otherwise pretty solid knife.
Thanks, Vassili.
P.S. Just checked Cyclon - also has liner lock, this one pretty comfortable.