Have been using them for the last year and a half. Really like them a lot. Put many of them through hogs with only one failure on the far shoulder, tip curled a bit. Did have a couple of bleeders break off in some targets and animals but they are pretty cheap and easy to replace.
These are my go to heads. There a a lot of great heads out there but these a by far my favorites.
One things is get yourself a Simmons wheelie sharpener cause most of these heads, I have had, need to be touched up out of the package.
Good luck with whichever you choose.