I have not been impressed with the long term durability of my Nexbelt. The stitching is fraying and has required a couple of trims. The frayed areas are generally around where my pant belt loops are, not even on the gun area, although that area is showing significant wear as well.
It has developed a 'dip' along backbone
The spring lock mechanism doesn't do a great job of grabbing anymore; the spring has lost considerable amount of tension. The plastic teeth have help up remarkably well though.
I really like the concept and how 'flat' it is for a leather-esque belt, but I'm not sure it is up to the task of daily use. It is currently my only black belt, so it still gets used, but will be replaced soon.