Expensive and it's required
2005 GMC Yukon
Crutchfield Customer Review (What's this?)
You're already spending $500+ on a radio, but wait, here's another $85 that's required. The unit is roughly 3" square and you have to stuff that behind your new radio somewhere along with all the pigtails coming out of the radio. Add to that 3 harnesses that come out of 3 different sides of the unit. It would have been nice if all the harnesses come out 1 side so the wires could all line up in the same direction making it more compact.
Pros: Allows you to install aftermarket radios
Cons: Price Wire harness layout