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After using this consistently for a couple of months, I have to say it's easy to use, reliable, and has a clearly-delineated user interface that makes it easy to plug in where you need to go and then follow the thingy there, even when you're plugging in fairly rural destinations.
It does have a few weak spots, though.
1) Like all new development in extremely areas tends to throw it for a loop.
2) It a very long pickup timeI've waited five minutes or longer for it to lock onto the satellites. I don't consider this a significant issue, because if I'm only travelling away, I probably know going anyway.
3) Again all it to break down with regard to precise street numbers. It'll take to within sight of to but it won't which of the houses looking at is the one want.
4) The dashboard mount attachment isn't really that great, and it a tendency to fall at random intervals; suction cups just aren't reliable.
5) It some sort of gyroscope in it that will orient the picture to what it thinks is 'face up". This reading it rather complicated in situations, for example if sitting in your lap while go up and a winding mountain road.
The main objection to getting this is that for the same price, a smartphone with a built-in and save yourself the cost of this device.
If intent on buying a dedicated this one's a relatively good choice out of the ones tried (much better, for than theNextar X3-03 Navigator, ruined Thanksgiving and made my girlfriend cry), all in a with a in feature will be a bang for buck.