I swear by them. I was skeptical at first. They are devastating broadheads. They open animals up very nicely. Huge entry & exit holds, profuse bleeding, no matter how good or bad the hit. These will definately increase your odds on a marginal hit as well, if it occurs.
The only downside... if you want to call it that, is that you generally cannot reuse them on more than 1 deer... maybe turn a used one into a small game head, etc. I believe I have killed 6 deer w/ the CTs now and I have seen everyone go down.