I would warn all potential buyers that they should use a bonded, insured, and licensed electrician to install The Gate. Additionally, require a signed and notarized letter from the electrician that they find The Gate to be safe in their professional opinion. Good luck finding such an electrician! 😂
Anything less and you can guarantee that your insurance company will laugh at you when you make any insurance claim related to your breaker box. They'll discover you have an unknown device connected to your breaker box, that you have no clue what it really is, or what it does. More importantly they'll find that it is not certified by any NRTL (Nationally Recognized Testing Laboratories).
$5000 could buy you FIFTY+ Furman SMP pieces or Series Mode conditioners! That's probably enough to filter almost all electronics in most homes. That will result in actual noise reduction that's been measured, and far greater proven safety & protection for your home and electronics, than anything from PPT. Furman products are certified by UL, CSA, ETL and TÜV!
You could even put part of that money towards a Furman ELITE-15 PF I for the main system, and have proven Power Factor technology & over 45 amps peak charge for the most extreme peak power demands.