I put one on my Black Ice and I think it's one of the best additions you can put on a bow. It even added 5 fps to the speed and took all the remaining string vib. out.
I was going to take the bow jax off , but I'm glad I didn't. A good friend of mine took the bow jax off his 07 tribute and he's going yo put them back on. I believe they do different things as far as string vibration or at least work together.