The best noise reduction I have ever heard.
Er.....if you were in the mob that would be straight in the squadron line book!
I use DC 13.4s. Had them yonks and they do what it says on the tin. I think if I was flying 100+ hours a year I would invest in an ANR set but for the odd weekend bimble I don't think it's worth the extra expense unless you have money to burn. But then if we fly for a hobby I guess we all have that...