We have a Garmin Nuvi 360 and love it. You can change the voice - we now use the British male voice, since the American female sounded annoyed whenever she said "recalculating" (which is what it says when you don't do what it told you to do.)

When I drive with printed directions (which I do less often, now that we have the GPS) is print out the directions in big bold print, so I can read it when driving, if alone, or navigating - usually Ariel Rounded Bold at about size 20.