Just get the ones that do not open up with a motor system. Like th Jenson and the first imge. Those are mechanical components. The motor inside tends to burn out or break down and then your screwed.
So dont get the:
Pioneer AVH-P4400BH and the Jensen VM9215BT
Suzuki 2008 SX4 Sport Sedan, 4cy, Pioneer Audio, 67,000 miles