Tried the Garmin 680 first and liked some things about it, but it had 2 big negatives vs. Go 720...
The 680 has a better suction cup mount...that clamp is nice and secure. Tom Tom is less secure and they should adopt a clamp mount.
680 has somewhat better sensitivity and gets satellite lock faster. TomTom will often not lock indoors while garmin usually will.
Go 720 lacks an AC adapter (cheap!) 680 has one.
Go 720 lacks a carry case (cheap!) 680 has one.
680 manual is awful. Does not even tell you you will be single state limited if you enable WAAS. TomTom is better.
Navigating ability is comparable. Neither is perfect.
Go 720 is more of a quality piece. 680 is just a bit cheap-feeling. The ball mount on the 680 is Micky Mouse.
The FM broacast capability on the 680 is simply inadequate. The Go 720 is MUCH better. Garmin should not even claim this as a feature.
The 680 navigation screen is pretty, but information poor. The Go 720 is very information rich in comparison, but some will claim that this makes it look confusing. They are wrong.
The user-updatable maps of the Go 720 are a big plus.
Garmin map updates are considerable cheaper.
The Garmin battery lasts a bit longer than the Tom Tom battery. Neither is long-lived.
The Garmin internal speaker is worse.
I wanted to like the Garmin 680 more, but the sparse screen info and pathetic FM capability were a deal killer. The Go 720 is the way to go.
I am also going to try to enable voice input as it seems that this can be done with at least some U.S. units.
Get more detail about TomTom GO 720 4.3-Inch Widescreen Bluetooth Portable GPS Navigator.
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