I was chatting with a guy tonight about them on another forum (he is a compound shooter). He just got some, and shot them after work. He says they are very sharp, and fly great for him. The bleeders are held in with some kind of "C" clip and are tight, no rattles. But the fact that they come off means you can sharpen this thing (I had my doubts looking at them on line). He shoots a set-up that is not fast compared to what some are capable of, in the 250ish range, they should do the trick alright on deer for him. He said they do hiss a little. Not bad though, like a slick trick if any of you have tried those.