Sorry if this has already been said.
I have the beats edition 4501ra I used King Root a few months ago. I was able to get root but the superuser program installed with it looks untrustworthy.
I opened up OS monitor and was able to see where the super user program was connecting to and it was the Chinese Government main ISP. I don't know enough maybe every web address coming from\to China goes to this group of IP's but yeah be careful you are granting a program full root access to your phone which has outbound connections to China.
Going to try Kingo root now.