I guess its all in what you prefer. I love thunderheads and have never even thought about changing. I know no mater what when i shoot that my blades are going to be there to do the job. I dont have to wonder if they are going to open or not. I have used the same broadhed to cleanly kill 3 deer without respharpining, just put it back in quiver and use on the next. No wonder they are americas number 1 broadhead