Rating: 
The Nuvi 680 from Garmin is just a well rounded and great gps product. The screen is bright and vivid, as well as the voicing is clear. It’s good that it reminds you about your next turn early and frequently, but not as frequent enough to annoy you. I have to say that it’s fairly decent in calculating the routes and that’s an important fact for gps systems.
You want a smart and responsive product; otherwise you’re only going to feel bothered by any lag time from calculating and instructions. The Garmin Nuvi 680 is solid performer, I don’t think there’s any problems with it.
