So that's the VL2 system? More pictures of the interface please. What's the climate control and trip info pages look like? Like you said, it is a bit pricey at $550ish but for what it does, I'd rather do that than anything else.
Climate control and trip computers remain factory. They don't interface with the VLine system at all. Even the factory nav still works—the VLine takes over the 'disc' slot, and just takes over the screen you'd see when changing discs, tracks, etc.