ORIGINAL: YooperMike
The only experience I have with them is on a coyote, and it wasn't good. Shot the coyote and hit him well. He went and layed down about 50 yards away, so I just left him, thinking I would pick him up after the morning's hunt. Well, I look over again about 20 minutes later, and there he is walking across the field. Never did find him, but the boradhead was destroyed. All of the blades were missing and the leading blade was broken off as well. Definitely not a very durable head.
I find it very hard to believe that you hit a coyote "well," (which I would intrepret as a lung and/or heart) with any broadhead and it layed down and then walked off w/o you recovering it. I would say your shot wasnt as good as you thought.