Just point the camera at what you need to scan, and it's done. No need to take a picture, or press any extra buttons. If the QR code contains a URL or a text file, it will be opened automatically. For contact info, like emails and phone numbers, you will be prompted to choose the right action.
QR Code reader recognizes most popular barcode formats, including UPC, EAN, and ISBN. It will show you the price of the product, online reviews, and other info it can gather.