It annoys me not having the phone option, with redundant buttons, but no sat nav as well would really annoy me on the 4200 info display.
I used the sat nav to guide me to a little village in North Yorkshire on Friday. Was amazed it was in the database (unlike Apple Maps...) and my friend in his 997 Turbo got lost, with his mega fancy Porsche system! So it does do the job, when needed!