I have figured out how to use my mobile phone's built in GPS (Samsung epix i907) from my carpc [see this page], however was wondering what other folks thought about that method verses a dedicated GPS.

So far here are my Pros/Cons:

For phone GPS:
1. Single device to manage
2. Tracklogs can continue to be collected when hiking away from the car

Against phone GPS:
1. Possibly can't talk (or more difficult) while using GPS
2. A dedicated GPS unit may be more capable