I just got my Roadster 2.5 but can already tell I don't like the Alpine system very much. It's ok so I'll probably keep it for a year or so but I'm starting to think about upgrading the system at some point to something with a better navigation system like TomTom (Sony is selling a new system that uses the actual TomTom software). Has anyone done this already? I know the Pioneer top of the line system is supposed to be better, according to the reviews I've read, than Alpine so I wish Tesla would have used that instead. The alpine system is horrible it's just that my $250 TomTom is much easier to use and better than the Alpine (although that's the case with almost all factory navigation systems being beat my cheap portable navigation systems).