I've got one! I posted a couple sound clips in another thread but this is a good place for them for reference for everyone.
I ordered the "Competitor Series" with the dual ceramic black tips. There's a bit of extra clarification required on that regarding our trucks. Carven has the R muffler which is the louder of their offerings and the TR, which is quieter. Usually Competitor = R, however, for our trucks they they designed a muffler specifically for the 5.3 in the Competitor package. As far as I can tell it is a slightly longer R muffler, I imagine with the intent of reducing drone and optimizing the exhaust note. With that said, on to the sound clips:
Cold Start:
Warm Start and some revs:
The videos do an OK job on conveying the sound of the exhaust but the miss a bit of the pop and crackle in some situations. For my taste, it's just the right amount of pop and crackle, so don't be concerned if that's not your taste. I've been super busy lately with personal stuff but I can try to take some more videos if there is interest.
As far as fit and finish goes, it's second to none. The whole kit is 304 stainless and the TIG welds are beautiful. Best quality exhaust kit that I have experience with.
I hope that this doesn't sound too fanboy, I'm just really really impressed with this company and their product.