We use the Garman GPS-18 and it works as well as any of the others,It is just a matter of learning the unit you have and the software. The GPS-18 feeds into the Laptop PC with the big screen..we like that.. there is plenty of room in the 05 F-350. The driver NEVER looks at the screen//Whoever drives drives and the other is the navigator. They all have their little quirks but you will learn to work around the software.
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