What are the opinions on these for people who have dropped their phones. I have a 5 year old and a 16 month old who sometimes hold my phone. I ordered AppleCare+ for my new iPhone 4S so I'm feeling a little more risky and would love to have a thinner case. How well do you think it protects the phone? Has anyone used one of the knock offs? Is there any place that sells the real ones for a discount or should I just pay $29 for a tiny bit of plastic and rubber?