if you look at the back part of the blade, they are steep of an angle as most big mechanicals... kind of counter intuitive for broadhead design (especially for light draw weights)
I remember when folks raved about them back in the day, I did buy one pack, and shot a deer with one, blades got really dinged up, and weak blood trail (I know that's a relative thing) I was in my muzzy using phase at that time, and went back to them, haha.
I think for a 3 blade replaceable head, it's really tough to beat the exodus right now