Having my IS for one week today, I am in love with it. It has been so far worth every dime and I don't think I'll ever get sick of the car. But, I decided against the NAV. It jumped my payments up almost 100 bucks a month, and although the ML/Nav sounded awesome... was it really worth the price diffrence (woulda paid close to 37 instead of 32 for 250AWD.)

Mike

 

"Value" is different from one person to the next. That 100 bucks may be "worth it" for some, and "too much" for others.

Personally, I find the Nav system worth it with the ML, and if you hack it. I get the most out of my Nav system as it guides me when I need it, and it entertains my passengers.

Check out this thread, where this has been discussed extensively:
Nav System - Worth it?

 

we laready have threads like this already (as philipmspt pointed out). i am closing this one