I shoot a WB, I've never noticed the noise that alot of people talk about.
BBM.....it's all in what arrows you shoot. I found out after I got rid of my WB....that the Radial X-Weaves were the loudest arrows (when drug across the bristles). I know that others aren't as noisy....and some are silent (My son's friend had some that were 'coated' and absolutely silent).
Rick....you hurt my head. I don't think about any of that stuff when I shoot.....yet I hit what I'm looking at a lot of the time. I don't know what a valley is.....other than a space between two mountains.
Moving parts???? Some people forget that the WB is aptly succeptible to being knocked out of place (just like a sight could be). It's not fool-proof.
It's a good rest. It's not for me.