I like the turn by turn navigation, I thought it was easy to use and right on the money. However, one thing did bug me was when I had it on the lock screen, it would go off and than turn on right at the turn.
For my iPod Nano (3G) I still have with me. I gave away my 3GS when I got my iPhone 4S last year. So, for any Apple product I have (Macbook, Apple TV), I will keep it as long as it works. For my iPhones, every two years.
I would love to win an iPad because it would help me in my studies to become a police officer and it would help me save a lot of space and help get things done for me. Not to mention, I should mount it in my car to show that an iPad is better than a PlayBook's QNX Car.