Scosche Magicmount here – no need to fiddle with a cradle, just pop the phone on and it sticks in place. The metal plate sits inside the case and you wouldn’t know it was there when it’s not on the mount – though I’m not sure how it would work with a flipcase.
I have one of the flat mount ones stuck to a flat bit of my dash next to the stereo – so it’s also pretty unobtrusive without a phone. They also do mounts with adjustable bits if you haven’t got somewhere convenient like that. And of course suction cup ones for the screen – though personally I don’t think mounting anything obstructing your view out of the screen is a good idea when it you can see it just as well mounted on the dash below the screen.
Oh and like others I use the phone for satnav, for which it works better than a dedicated satnav – particularly as often I know where I’m going but interested in diverting due to traffic (and it will also find me an off motorway supermarket). I don’t do other things with it whilst driving – though will answer a call on the car’s bluetooth if I’m on a motorway and the call doesn’t involve too much thought.