This is often a highly rated GPS unit, for good reason.  It's easy to use right out of the box, and the small portable size (about the size of a PDA) means I can jam it in my purse every time I leave my car.  The built-in battery means I can take it walking with me.  There's even a pedestrian function on the unit! 

The unit speaks street names which is a big help.  Instead of "turn right in 0.1 miles", it says for example, "turn right on Washington Street".  On that note, it also has funny quirks which I don't mind too much.  For example, when telling you "turn right on Martin Luther Dr"...