Is anyone out there really good with Camera+ for iPhone?

I keep reading all these reviews on Camera+ that say it’s the best replacement for the default camera on the iPhone. I open it up and am a bit befuddled with the options. I look for tips and I see basic camera tips, like “Use the rule of thirds” I just want to know what all the buttons and features do, why and when should I use them and how these things will make my pics better.

Anyone good with Camera+ or know a good website for it?