More complex than it needs to be

This is getting installed in a 2005 Sienna Limited with JBL. I was an installer for 10 years on and off, I'm familiar with PAC products. As others stated the instructions make the item more confusing than it needs to be. After hours, and hours of tinkering, this really should have taken an hour to install, 2 tops. After installing this into the Sienna, I've gotten the front speakers to work but the rear speakers just don't work. The steering wheel controls don't work either. I understand that Toyota made it very difficult to add an aftermarket radio into this, but you promised a solution. Maybe I'm doing something wrong, so I've reached out to tech support, still awaiting. I will revise review based on resolution from PAC.

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