Currently, I have an APC unit connected to my CATV line in the basement, close to where it comes into the house, and before the amplifier.
Whenever we have had the cable guy to do any work, he has always disconnected this device. I don't know why, except that maybe it's not on his list of "accepted" devices for use with the system. It doesn't do any harm, so I keep it connected.
This one looks to be better than the APC. Don't know whether it would be "approved" by my CATV provider, but I don't really care about what they approve of and do not approve of. It's my equipment I am trying to protect, not theirs<g>
Who is your provider? Mine is cable one. I had rg/11Q terminated, the tech didn't even touch the arrestor.
A good ground is the only thing they should care about, most techs just sink rods and thats a violation.