Vehicle GPS Help Please

[namgrunt]

I am thinking of purchasing a GPS for the truck. But, I need one I can see clearly. So, this means a larger screen. I see that Magellan has a series out with a 7" screen.
Does anyone have any experiences with Magellan GPS units?
Your thoughts, etc?

Here is their site & model I was looking at: http://www.magellangps.com/Products/...-RoadMate-1700