I am using Inav on my IPAQ HX2495. It is ultra portable, and I still have the ability to use it for emails and web browsing at the hotel. Tried the laptop route but too bulky for the car, and not easy to view when checking the route. I can still preplan at home by enetring all my favorites, and adding a new destination on the fly is simple but should be done at a stop. I have tried Co Pilot and Tom Tom but prefer Inav.