My cordura one lasted for a couple of years with weekly mining and caving abuse, the only slight problem was the velcro fastenings as previously mentioned which if you got them caked in mud were difficult to close.
I did buy myself another cordura , which i'm still using.
I didn't have much luck with yellow PVC one though, that just wasn't up to the job.
The seams weren't sealed/bonded, so after a few trips that involved a lot of sliding around or squeezing through small gaps, it basically just wiped the stitches off and fell to pieces :blink: