I can swap between screens while riding and the NAV voice comes through the speakers just like in a car. I like the split screen with NAV and your source showing all the time. I bought a Bluetooth module and like my iPhone through that to the radio head unit.
Once I got to the RCA's for the input to the amp versus the speaker wires like what I had for my HD HK radio to amp, it works fine now and the volume is good too.
I really like the new head unit, a LOT! The "ONLY" reason I ever thought about upgrading my CVO, was when the new '15 came out with the Rushmore audio system with NAV. Granted this is not a NAV head unit, but with the Apple CarPlay, it works just as good. There's a bit of a lag hooking up when I start up, but I'm guessing that's because of my Bluetooth and NOT being hard wired via USB. This way I have my RAM mount with the QI charger module and hard wired that to my main power supply. Then just slip in the iPhone and not additional wiring needed.
I'm sure you'll like it Don. What's another grand in the whole scope of it??? 
Happy New Year everyone!
Dan
I am still thinking about it Dan. For just a bit the idea of a new bike percolated. Then I just wasn't interested enough. Still like the old one better. Also noticed that, at least for the moment, the radios were on sale for $200 off. Now I'll probably think about it too long and miss the sale.
I wish the radios did a bit more than they did. But there's a lot that they do that I'd like. Decisions decisions.....