I only want it for the other stuff. It's kinda nice to just have a map up when driving though. Even though I don't really use it and still just do my phone.
Most people use their phones nowadays as it's alot easier and cheaper. A Double Din does look nice, but if you have a decent phone with a decent size screen, you could opt for a cheaper DD without Navigation
Personal preference, I have a DD navigation. I like being able to listen to music and then the radio lowers the volume so the navigation can guide me. (Different job sites for electrical work) and still have my phone free for phone calls.