Here in Seattle, the traffic info is pretty good, but beware the system is only as good as the data feeding it. It tends to only highlight major incidences and closures--not minor slowdowns.
The NAV system..., set your expectations really low. The main 3D view is actually pretty impressive showing a great deal of detail and relief information. The database for the NAV system is awful. About 30% of the addresses we've added in do not exist and it does not have a way to guess at that. It will just refuse such entries. Points of interest list is almost useless and very hard to navigate through. One way around this is to use the BMW remote app, use Google maps section to find your location, then have that send to iDrive. This method has worked out pretty well so far. Oh, yeah, it won't speak street names either.
HUD is nice. When the NAV system is working for you, the integration is sweet.
2013 X3 28i (prem, tech, cold1&2, conv, hud)