I have tried a few dozen of them before as well. I found them to have relatively good consistancy with spine, weight and straightness. However, their durability left alot to be desired in my opinion. While removing many of them from 3D targets I was forced to twist them to get them out. Consequently they bent without breaking. Some of the inner layers of carbon broke without producing any visible cracks on the outer layer(s). I started shooting very poorly with some of them but did not realize they were bent unti I was looking down the shaft at full draw. I have had the same situation arise with other well known carbons but not to this extent.