I carry one on every hunt. Look at my screen name and you will see who manufacturers them. I produce and sell a lot of hawks out of my forge. I love them. Splitting a breast bone, or pelvis is really easy, even on large animals like elk. With a hammer poll hawk pounding in stakes or making a blind is light work. I wouldn't be caught in the woods without one. I consider them to be as important as my knife.
I want to add here that I hike long distances and hunt far from my vehicle. I often end up camped next to a kill overnight, so the hawk is an important survival tool, and definately makes my life a lot easier when I have to put up a quick shelter or ground blind, gather firewood, clean an animal, etc...