Nez,
Best thing about this is that it is UK Legal. A big useful knife that only self sharpens when you want it to (you have to push the blade toward the handle in the closed position where you will hear a nice grating sound). It is also one of the few non locking one handed openers I have found, and as for the lack of lock...it just means you have to practise safe knife work.
All in all I have 3 in various locations I rate it that much.
Hope this helps,
Flash