Garmin Nuvi 205 3.5" Touchscreen GPS Navigation System —
... with a good implementation. The GPS functions are easy to work, mostly it's very intuitive.
It does route oddly on occasion - on a recent long interstate trip, it tried to take us there completely on surface streets, and back completely on interstates. We actually did the trip at a bit of a mix; some of the local surface street routing would have been much longer that the interstate path I took on the way there - not that everybody else doesn't do that too, sometimes. But on the way back it bypassed all that for intersate.
Again, all GPSes occasionally route via a "quickest route" that takes a lot longer; the only reason it's odd is it took the interstate way home.