Nav System

Personally, I'd never own another vehicle without a NAV system. Even my motorcycles have one.

The only bug I find in the Prius unit is that the voice recognition doesn't work all that well.

You say "Potato." It says "Tomato." >:o(

Other than that, it's fine. It detours well, especially unfamiliar neighborhood streets, and gets me to unknown destinations fine. The addition of the NAV package allows for the no-hands cell phone too. Should it become law (no hands on the cell), it will free you of a Bluetooth headset and dialing since it's built into the display as well. Better stereo too.

Besides, it makes the car geeky and serves to impress everyone around you.

B~

I don't know anything about the '06 models having anything different than previous ones, but as an owner of an '04 I have no idea why based on that you wouldn't want to have it. Now, I haven't ever used a navigation system in any other car, so I have nothing to compare it to, but I use the one I have all the time and absolutely love it. On those occasions when I'm driving a different car, I feel lost (literally) without it.