Backup camera on my C3 installed today. Not a huge deal, but nice to have nonetheless. It was a little underwhelming when I thought about how little I'll actually use it. It's not like the c is difficult to see out of. I also wish I had the lines hooked up, and that the lines projected wheel alignment. I know the Infiniti G37 has the wheel align guidelines, and they are great for parking. Other than those thoughts, I'm happy with it. The cam is an EchoMaster OEM camera. I got it on ebay.
