Looks like most have usability issues when working with ipods. Other are too expensive for what they do etc. I have been unable to find a decent double din unit.

Alpine lack quality control and you have to add another $400 in boxes to tune the system.

pioneer decided that certain actions like changing volume need to be two levels deep.

Clarion makes you scroll through every single artist without a skip or search function.

Kenwood has clunky interface.

The eclipse dd unit sticks out and isn't flush with the dash..