Not much to say, it works really well as expected.
In the past, I've been able to "unlink" Sram & Vipperman master links by hand, but was unable to unlink the master link (referred to as "Missing Links" by KMC) on my KMC 11 speed chain. This tool worked perfectly.
This chain plier is better than the PARK TOOL plier because it has a spring that self opens the jaws.