I gave one to a woman I know who used it first thing to clean and butcher a freshly killed rooster, for dinner. It worked great for her.
They are usually shaving sharp out of the box. I have tested mine on the end of short and long sticks as a spear, and it is safe, in my opinion for thrusts to soft tissue areas or for very clean long-range slicing or even chopping at smaller branches.
I didn't feel confident thrusting into hard targets with it on the poles due to the thinness of the blade -- and especially not when it in the hand as is: no guard! In the past, they've had weaknesses at the joint of the blade and handle, but Lynn Thompson was contacted by some experts who had the problem, and the problem was, I believe, corrected.
It makes me nervous as a thrower when used as a spear, and I do think that if it stuck into bone and was twisted sideways, it might snap at the blade juncture when attached to a pole.
That said, it is a GREAT and useful knife at $20 -- you can literally sharpen it on a rock if you don't have a sharpener.
Hope this helped...
Brian.