Remember the Blackberry and other phones with keypads? That feature is back!
Just slide your iPhone into the device and start typing. The keys are backlit for night typing, and it runs off the phone's battery, so no charging required.
Having a physical keyboard below the phone elongates the whole package, so you might not be able to fit it in your pocket, and it's hard to tell if the extra length will make it a bit tougher to hold while typing. But there are definite advantages to a dedicated keyboard, most notably faster and more accurate typing than on a digital keypad, as well as a command button to allow for shortcuts to the home screen or search bar. A less obvious benefit: Without a digital keyboard popping up, you keep your full screen when typing.