Pros: Great price on long zip ties. Variety of colors can make them useful for identifying cable bundles.
Cons: The strength on these is a little less than I expected.
They may be accurately described @ 50lbs tensile strength, I just had a few break while I tightened them, and one break from excess force after installation. I use them for securing the top of my extension ladder, when climbing on top of buildings. I just added a few extra zip ties to hold the excess force being applied to them. Worked like a charm.