I wore a Hanks kydex-reinforced belt for about one year, and the kydex stiffener inside ended up cracking. The belt was then obviously sagging at that point. I contacted them about it and they offered to replace the belt with a steel core model, since their experience was if you crack the kydex once with your carry rig, you're probably going to crack the next one also.
I took them up on their offer and received a new steel core belt from them. However, that thing was extremely thick and heavy. I ended up selling it new in the pack because that just looked like too much belt for me, unless I was going to OWB carry a Desert Eagle or something.
I ended up going back to using a leather gun belt from another company that had no stiffener for a while, then picked up a leather Kore belt and was extremely pleased with that. I have both leather and nylon version of their belt. Over the course of about 1.5 years, I wore bare spots on the edges of their nylon belt which I wear more often than the leather belt, and with heavier gear. I replaced that belt with a new one, trimmed the worn section off of the old one, and gave it to one of my sons who has a waistline several inches smaller than mine.