I've carried the hissatsu folder on duty for seven years and after I reground the edge it is a stabby sharp knife! My +1 on James Williams designs!
Regarding the original Hissatsu folder, I'm not sure if anyone else here had a problem with the spring-assisted mechanism being a bitch and 1/2 to deploy. The pocket clip on mine was also easily prone to getting bent or loose despite being tightened down. On a friend's folder (same exact model) it was easy to engage the blade as a Zero Tolerance or Kershaw. Mine however wouldn't budge, even after applying a little Slip2000. However a couple years I bought the CRKT Otanashi (non spring-assisted) which I liked much more. It has a slimmer profile, lighter weight and due to the G10 you get a much more positive grip even when it's wet.