People like to steal Kenwood, Alpine, Pioneer double din units.
For not much more than a Premier level Pioneer Double Din with Navigation, you can get whatever factory ACM you want and get any features you want.
You can go from the 4" screen with nothing to the 8" screen with everything even on-screen climate controls. He can change the stock boot screen to the Euro market ST boot splash as well.
The strength of the stock ST1 radio is that everything is integrated into your steering wheel and you have basic voice command as well. There's no sound processing going on either, so you are free to install a simple LOC all the way up to whatever DSP you want to run.
As the video states, you need a different ACM, antenna and you get Sirius. He has to enable the extra Sirius menu but it's all there. One the thing stopping me from getting an ST1 was I couldn't get Sirius which I have been using since 2006.
I love Sync 3 but don't like the Sony DSP/Amp work-a-rounds. Waiting on the Rockford-Fosgate solution so I can re-use my Alpine V9.