I agree with others that its not worth it.
- The HD Radio traffic map is useless.
- It appears to only take historic traffic into account on routes, not current traffic like waze, google, or apple maps
- Unlike waze, google, or apple, they lock the input when the car is in motion, huge pain if your passenger can't edit stuff
- We tried to use it the first trip from the dealer to my wife's office, and it didn't have the address even though the building has been in there for years (and I did check for updates after, we have the latest)
Best option would be a smartphone, but if you can't do that, and you can put up with a little clutter, you would be better off looking at a standalone GPS unit that has traffic built in (one that doesn't use the radio for traffic or require a smartphone link).
Even if you don't care about traffic, the fact that the maps are out of date and that you can't use the GPS when the car is moving is enough reason for me not to use it.