I have to agree with Arthur,and while I have heard good reports like these already posted,I cannot put that much trust in something so critical to my hunt.A properly tuned arrow/broadhead has never let me down and my fixed blades can't fail to open.I admit I have never even tried one so I'm not speaking from personal experience,but I think I'll stick with what works for me just the same....if it ain't broke,don't fix it!!