Stainless Steel rods have gotten a bad rap undeservingly IMHO! The reason that Brass, Aluminum and sectional rods are not good is that they are soft, scratch up easily and drag debris and crud back and forth through your barrels. Sectional rods are the worst as they always loosen up between the sections! Hard Stainless Steel rods stay straight and true and won't scratch up and drag debris through the barrels. If for any reason a Stainless Rod should get a slight scratch it can easily and quickly be removed with a fine piece of Emory Cloth. They should be checked from time to time and if they have any defects hit them with a small piece of very fine emery (I use 1200 grit) and clean off all dust.
The key to successful cleaning without damage is to use the proper size rod. Some guys use one rod for everything - I don't. They make rods in different thicknesses for different reasons. For novices or guys who lack finess a rod guide is a helpful accessory especially when cleaning a barrel from the front (some guns can not be cleaned from the breech like revolvers). The Stainless Rods are extremely rigid and I have not bent one yet. bent rods (IMHO) should be discarded BEFORE they damage a gun.
Maybe they have improved coated rods since the last time I've tried one but they always seem great in the beginning and seem to chip and flake shortly thereafter. When you get these chips and flaking this creates crevices for dirt and debris to be dragged in and out of the barrel - defeating the whole reason of using a coated rod in the first place.
I use a 5/16" thick solid Brass Dewey Rod for my shotguns only.
Again, coated rods are terrific as long as they stay in pristine condition. After they get worn, they actually are self defeating IMHO. Like I said, maybe the newer coated rods are miracle rods and stand up better, but the ones I've tried in the past didn't. I also clean a LOT of guns. Dewey Stainless works for me.