The rooting procedure is as simple as it is with Towelroot. Although the app is entirely in Chinese, you simply have to tap on the blue button and wait. After a couple of seconds, the app completes the process and your device is rooted.
It's important to know that KingRoot doesn't work with all devices. With Moto G, for instance, you can run into some trouble. With Nexus, though, it usually works perfectly.
KingRoot is an excellent way to root your Android. That said, rooting a device is always a delicate process, so tread lightly and be aware of the risks involved.