xoB, it should be as easy as: you put your phone in a mount, you push an icon on the display, audio starts playing. At most you have to insert a 1/8" jack.
It should be a better user interface than the common car stereo is these days. The designers at Clarion want us to die in a fiery crash:
That's seven buttons in a circle, which you can't identify by feel. The "menu" button will bring up a complicated display that you have to look at to operate. Then there are eight buttons along the bottom, which you can't identify by feel. There appears to be no pause button, or if there is, they've hidden it really well. From here it looks like if you want to stop playing something, you have to hit the middle button for longer than a second, turning the entire thing off.