This belt is a great value. If you're perpetually between holes with conventional belts or can't find the right length, the infinitely variable nature of this belt is a panacea. WM has them for $8. They're very sturdy and can easily be cut to length by popping open the metal alligator clip behind the buckle.

I've had two problems with it. The buckle can be difficult to open if you're trying to pull the metal slider back. As I was alerted in a comment, the trick is to pull the loose end slightly tighter, which releases the tension on the slider. The second issue concerns the metal buckle. It deforms relatively easily and has a tendency to fall off the rest of the belt if you're not careful how you pull on the slider. Still, eight bucks? It's worth it.