3. I hate moving parts, but haven't tried expandables.
7. No reason to fix what isn't broken. I've never shot expandables but love the results of my fixed blades.

I feel that theless moving parts on a bow the better... and yes, an arrow is a part of your bow, it does do half the job.
My Muzzys haven't let me down yet so i figure i won't switch till they do.

Good Luck to you all this season!