For those waiting who got the nav, IMHO the wait is worth it. I don't have much to compare to, but there are alot of nice functions that I though were really neat.
I'm glad I waited to get the nav, some say there are better out there for less. but to have it already come with the car and avoid the hassle of dropping off the car at a shop to install is worth it.
This will probably be my last post here, so again good luck to all waiting. Like many ppl said, the wait was well worth it.