This was a very intresting post and educative reading for me.
No, I dont use such a bag. (And I do know what the Faraday Cage is).

These are bags designed to protect you from cybersecurity threats and protect your privacy from intrusive government and google tracking programs.

So, I deduce - you are one of those folks?
Dont get me wrong but I slightly suspect that
a) this bag will not be doing the job its supposed to do;
b) google, govmnt etc. definitely have other tools of getting what they want.
I mean, when you connect using internet - they do sniff-sniff...sniff-sniff... sniff-sniff... - and, voyla! - you are recognined and counted and put into database. they run Big Data, with all the AI Clever Soft involved .. you know. Trying to hide from the government supervision with such naive means makes no sense. Then you have to throw away your phone, credit card, hide your face inside a hoodie on the streets... and I'm not sure that even that will save you!

ps. the bag looks nice btw. Have a consolative !BEER for me 😎