English Electric EE1 Network Filter. Anyone have one?

I have been reading up on the English Electric EE1 Network Filter. Has any one here implied one of these in their system. I have galvanic isolation more for lightning and surges. Would love to hear feedback on these types of bevies, in this price range, $100 to $300 USD. Muon Pro is of little interest to me right now. Would like to try the EE1 and Have the IFi filter on the way. 
 

Cheers boys.