There are more things to the Nav than just navigation. I personally love the point of interest function. I get in the car, select the category I want (restaurant, art store, grocery, etc.) choose current position and off I go. Saves me a ton of time.

The other night, the boyfriend and I couldn't decide where to eat. Selected the types of cuisine we might be interested in, pulled up the list, found a restaurant we liked, pulled up their number, called ahead and off we went.

It's worth it. It adds a lot more fun and convenience value to the car.