I have heard good things about them, that they perform well. But, I'm all for all so far when I hit critters with my current stuff, sooooooo..........?
If I ever get to the point where I can afford to go to cool places and hunt huge, tough, dangerous game, then I'll be able to afford top of the line stuff to do it with. But as long as I am hunting tiny deer and small game on little parcles of public and private land in the south and midwest, where we are short on cape buffalo and tigers and polar bears, I'll stick with my wood/cane/low end carbon shafts and just take short shots that I am reasonably sure I can make.