Only had mine less than a week, but cabin is quite quiet coming from a
Pontiac G8 and GTO. Road noise is minimal and this thing really glides over bumps in standard mode. In Sport or GS modes, I can notice a bit more of a firmer ride, but not much more road noise.
Audio System is decent with the Upgraded Bose system. Nothing to write home about, but better than an average one. I haven't adjusted the EQ enough to really get it how I like yet. Need to increase the treble slightly as I like highs over bass. I like having a USB port for music. Can't comment on the Satellite radio as we do not receive it here in my area. Has HD radio too... Which we also don't have any stations that are broadcasting in that here yet lol.
Visibility is the weakest point for me. It's not bad, but it's not great either. The hatch glass area visibility is of course smaller than a sedan due to the rake of the glass. Likewise the front windshield has a steeper rake than you would expect. Mirrors are good, but they are large and close to the A pillar causing a big blind spot in certain situations looking past that area. Again, not a deal breaker, but something to be aware of.
That said... The seats, the ride, the pull and sound of the V6, the cargo area and even the handling. They all are perfect to me for a car like this which wound up being the reasons I added this to my garage. Again, I would test drive one to be sure it lives up to your expectations.