Palm Treo GPS Navigation Bundle
I always get lost, sometimes even when it's not the first time I've been somewhere. And my eyesight is crummy, so I can't see street signs. I got this for Christmas from my husband and it worked perfectly out of the box. It redraws routes quickly (very important) and is fairly intuitive. It offers two different views (I like the 3-D view) and the software is very easy to understand.
This runs great on the treo! TomTom is an excellent navigation system. I love being able to see where we are in real time and see what we are passing by as we fly down the interstate. (Not while I'm driving, of course!)