My husband bought me a Garmin Nuvi for Christmas; he said that the Amazon consensus was that it was a bit slow to load when it woke up, but it had by far the best user interface. I'm addicted to mine. When I tried the built-in GPS in the Toyota Prius and another car, I was struck by how hard they were to use, and how much I fumbled.

There are some tricky hidden things in the Nuvi (trying to figure out how to add a "by way of" point was not straightforward) but the basic task of "Get me there from here" I could use straight out of the box.

I have the most basic model -- it says "Turn left" but not "Turn left on Ash Street" -- and it's good enough for me.