Good for me - one less thing to purchase😆
I have no practical experience with these grounding systems. While I have one friend who is happy with his, I have also read comments from Rex Huningford (KingRex Electric) who commented on the WBF forum that several people have been in contact with him claiming to find negligible results just like Steve.
I like Steve’s explanation stating dCS boxes are well built and seem to be capable of handling these problems on their own.
As always, your mileage may vary