I own a 2011 2ss convertible and I have had ongoing problems since day 1.
The guys at the dealer are really nice guys and they are trying but I still have the same 2 problems since day 1. Every time it rains my rear carpets are soaked. The water bags have been replaced twice, adjusted twice and carpets replaced twice and I still get water in the car. I have never seen any water entering the car so I assume its a water bag issue. I finally got GM involved against my dealers request and have a complaint #. The car is in the dealer again for its 5th attempt at repair.
Also I had the dealer install a non GM exhaust system when the car was delivered. The exhaust has been banging and rattling around when it's cold since the beginning.