Ok I finally got the Atak installed the other day and have had a lot of mixed city and highway driving. This is the best way to describe it..
You know how everyone claims the exhaust comes out of their speakers? No imagine it just ever.so slightly louder, just a few decibles, and real. Like a real exhaust note, but from the actual truck. The fit and finish was amazing. Installation on a lift with removal of old exhaust was like 30min. That easy.
So my final verdict, absolutely awesome. Has no bass notes or annoying interior noises at highway speeds. Very mellow and barely noticable if you stay steady at 75. On a low end and use manual mode, at around 3k the exhaust has an amazing exotic styled note.
So all in all the Atak sounds a little louder than exactly stock but with a purpose. 5 stars on Yelp.