Has anyone shot these? I am just wondering how noisy they are and how well the stabilize a fairly well tuned arrow?

I use them on the arrows I build for my wife.  They are insurance,  they bare shaft so well she could shoot them without fletch.  What I like about them is that the wind doesn't push them around.  They also help when she makes a bad release.
MAP

I've used them before on some carbon shafts in a 4 fletch configuration.  Thew flew pretty well with tuned arrows.  Quiet, too.  Give'em a try.

Thanks guys, I think I'll try em.

fly good 4 fletched and are very quiet.