I used them for a year, very impressed with the way they would mount up true. seems they had very tight tolerences in the mfg. process, they are stainless which I liked, always flew true for me and I guess my hearing isnt good enough to hear any noise.I killed a couple deer and a large bear with them and they are a quick killin head. BUT I had several come apart, the main blade would seperate from the feurrel (sp). I called hornes and the said I may getting them to hot mounting, so I used epoxy and still had a couple come apart at the place where the blades attach. when I pulled the head from my bear, the blades stayed in him and the feurrel (sp) stayed on the arrow. But this also happened on block targets. other than that I liked the head. And maybe I got some bad ones, but A big magnus is within 1/16 of being the same width and I believe a lot more solid head. Personally I went back to zwickey deltas.