I love them them. I have taken a half dozen deer w/ them over the past 2 seasons and all have gone no farther than 70 yards.
They inflict so much damage to the area they hit, that you always have an incredible blood trai. Any bh will do the job if you hit the animal right, but it is devastating w/ the CTs. Also, if you do make a marginal hit, the damage is so severe that your recovery odds drastically increase. I have helped trail several gut shot deer w/ the CTs and none of them wen more than 75 yards... and they bled well.
I swear by the Crimson Talon XTs. I have never used any of the Spintite's other products, but give these an A+...
BUT, don't plan on reusing them. The curved blades generally get pretty well beat up after hitting bone.