Well constructed and functional - just make sure you need this size!
Being a trained network engineer, I know how to make patch cables. That being said, I don't like to spend my time making cables when I can buy them from places that can terminate them reliably and securely, and come in under my cost per unit. The only downsize is that if you order the wrong size (in my configuration of 24 ports, the last 12 fit between the patch panel and the switch, but how the ports are arranged on the patch panel and how they are arranged on the switch made the first 12 ports a little longer than 0.5 feet - so I have 12 spares essentially). The feel rugged and substantial. I can definitely recommend Monoprice for their cables - just make sure of your lengths before ordering.
PROS: Well constructed patch cable, perfect for connecting a patch panel to a switch in a rack enclosure.
CONS: Make sure you don't need more than the 0.5ft length as they WILL NOT stretch, and its just not cost effective to return them if your guess comes up short.