I had this installed a few days ago at the dealer and I couldn't be happier with it.
I was pretty disappointed with the exhaust sound of the DT versus DS models with the 5.7 when I purchased this truck. The Mopar Catback wasn't yet available in Canada when I purchased my truck and I prefer OEM Accessories to aftermarket (most of the time) so I waited it out. Found a pretty reasonable deal for the Catback and the 5" Tips so I decided it was time to pull the trigger.
Here are a couple of observations,
Cold / Warm
It's a lot louder from a cold start than I had anticipated, I've even heard a crackle or a pop once or twice. The noise calms down within 5-10 seconds, after 20-30 seconds it calms down even more. As soon as I figure out how to go about posting videos on here I'll put one up as an example.
You definitely know it's there from a warm start but not nearly as loud as cold.
Cruising Speed
It's pretty quiet but you can definitely hear the difference versus stock, I don't think it would be a deal breaker for someone looking to upgrade but doesn't want their exhaust to be too loud. Absolutely no drone even when MDS kicks in.
Throttle Position
It makes more noise when you push the gas, it's a performance exhaust system that's kind of what it was designed to do. The sound level escalates the further you push the pedal, I haven't pushed it to WOT yet but I've pushed to 3/4 and it sounds magnificent!