I use them and have for the last three years. I don't really see them as being harder to tune than feathers. What ever you use has to be tuned properly. But I can say that having previously shot feathers, but now blazers, I will never switch back. If you are interested in them, fletch up a few arrows with them first, shoot those arrows,and see what you think.

I'm pretty sure you will like them enough to put them on the rest of your shafts.

Good luck