They are beyond phenominal shafts! I've been shooting them for a couple of years and they fly out of serval of my bows with no tuning in between them. Nock end is a little weak so I use nock collars on them and that makes them really tough. I think the problem with them is that they do not advertise them at all and most I don't think are really familiar with them which makes a small following. All of the Carbon Tech shafts are some of the best made shafts in the world in their price range and the Cheetahs and Panthers are at the top. Too bad for them.