Cabin is quieter than my C6 was. I don't find it noisy. Quieter than my diesel truck but louder than my honey's MKX Lincoln. My targa does not creak at all. My C6 did but it' was an an easy fix with a couple dabs of dielectric grease if it does. Haven't heard any tranny grief from our members other than the third gear bump of the automatics (and that doesn't appear to be much of an actual problem). If you search long enough, you can find any complaint you want... Especially if you are surfing some other forums where you never know what somebody will say. We have a big bunch of C7 owners here on this forum and you won't find many (if any) that regret their purchases.
Further to your other request Dale, I'm pretty sure you will get lots of response from northern members who will be happy to meet up for a show and tell. If by chance you don't, slip down towards Red Deer and meet up with me.
Yes there is some tire noise inside due to the XP Michelin’s but the awesome 3LZ stereo hides that well.
Only problem on my 3 manual Z06s; 2103 C6 and 2 C7s 2015 and 2017 has been controlling the sh*t eating grin stuck on my mug.
Otherwise excellent and not boring cars that are really incredibly reliable, backed with a great warranty, and so fun to drive.
If you are concerned. Buy a car with warranty left on it. That’s what I did before I bought my last one. Which was new.