Works great. If you line them up correctly on the zip tie, you'll have a true flush cut every time. I also have a couple of Knipex trimmers and they aren't nearly as good. The Knipex gets pretty close but still leaves a sharp edge on the zip ties. I would appreciate if they offered them with a lower angle and a longer cutting edge instead of a zip tie/puller on the underside of the jaws. The only real complaint I have is that the blade is a bit short for cutting wider ties in one go. But they're still worth the money if you deal with zippers on a regular basis.