DaveDave, almost as good as a TomTom, but you can have a meaningful conversation which TomTom does not like to do.

Or as my wife puts it, I don't need a nav system, I have RobRob. She is known for getting lost going from the office to the house, well not that bad, but close. We got the Verizon phones that have the capabilities of navigation, but I am not really that impressed. Most of the time the routes it picks are much longer than some of the optimal direct line routes. I have also seen the same thing with the TCH Nav. The other day, I entered an address of some property we are considering buying, and the Toyota Nav had me exit the highway and drive thru a small city, then go under the freway I had just exited and go past an exit I could have taken to turn a quarter of a mile past it. In short the nav added 20 minutes to my drive. Sure they will typically get you there, but they should not be relied upon as the best route.

The phone ones are just fine, but not worth getting a new phone just for it.

The car ones are nice, but only if you want the added features of the integration such as hybrid info. Also they are always in the car with you. No need to woory about leaving the nav at the house or encouraging a thief to break in to steal it.

The portable ones are great for a multiple car user and if you want it for camping, boating off roading etc. Some of the portable ones will even allow you to add your own roads, and do bread crumbing so you know how to back-track your steps. Also some of the portable ones can be integrated into a laptop for more functionability.