I like them. Killed my first deer with them--nicked a rib going in and going out, arrow went at least 7 5/8" into the dirt (shooting from a stand) after passing through the deer. I say "at least", because that was the last place I say dirt when I got the arrow home and measured--it may have gone deeper. No problems here with mounting them straight or getting excellent arrow flight. One of the easier heads to sharpen in my experience. Gobs of really big game has been killed with them, especially in Australia where they originated.