With or without a case? Because ironically, the Spigen mount isn't strong enough to use with a Spigen (iPhone Slim Armor) case. Neither does the Scosche for that matter.
hmmm... well in my case (lol) i have a slim case with the magent inside, and it's just sublime.
but you might have a point with thick cases.
well maybe no magnet holder can handle thick cases..
so if that's the case you are stuck with cradles..