I must have been fortunate as well, no problems here. However, the last two deer I've killed were with Slick Tricks, they did pretty well too.
any time you have moving parts, there is always a risk of failure of some type. I believe at the ATA show that there was a pro, his name eludes me at this time, that was shooting and had a problem w/them opening prematurely. I like my Muzzys, but I am trying out the NAP Hell Razor this yr. We'll see how it does.
I think the bottom line really is there isnt a product out there that doesnt work Broadhead wise. There are just some that do it better. and of course there will be positive and negative circumstances as everyones situation is different.
I shot my doe with the rage 2 blade this weekend. I was skeptical at first, but I got a clean pass through, no damage to the broadhead, and the arrow dug about into the ground about 3 or 4 inches. She only ran about 25 yards...maybe thirty.