I wanted a non-leather belt that wouldn't be damaged by sweat (I work a hot, sweaty job) and was wide and sturdy enough to hold my Leatherman multitool.  I saw a lot of wildland firefighters wearing this type of belt and decided to join the club.

At first I was very pleased with this belt--it looks good and for a while worked really well.  However over time (I've been wearing it 5 or 6 months or so) the sliding fastener has worn the nylon material smooth, and it loosens a bit as you wear it.  Especially in looser pants, which are the ones you need the belt the most for!

So I have to periodically cinch up the belt.  I can live with it but if I could do it again, I think I'd go with one of their belts with a feed-through design, though those are slightly slower to undo, if you have an emergency! :)

I might sew a patch of velcro on the end, to fasten it. We'll see.