The magnet mounts are the best thing since sliced bread. Just put the slim metal sticker inside the case (use a dual layer case and stick the metal to the inside of the outer shell so you don't see it). Mount the magnet anywhere (I use the vent mount but they sell other kinds). No more fumbling with the spring loaded holder. Just stick your phone on the magnet, and pull it off when you leave the car.
And its cheap!