Nuvi52 LM?

If your a truck driver and buy a non specific truck gps your asking for trouble. Look for a 465T that is there cheapest no thrills unit

 

I use an atlas, always have, but keep a small $50 tomtom on my windshield for eta reasons. My route is my route, and I don't let that little 4" gps guide me under a 11' bridge.

 

I put more emphasis on lifetime traffic (FM), than lifetime maps. The traffic feature is very useful if you're in/around larger cities often in the US. They will even tell you where road conditions are worsening with impressive accuracy in many [even rural] areas. Most of the maps updates you do get will invariably NOT have the new road that was finished a year ago. They are very slow to get new road additions and speed limits added in, and you are always hard-pressed to find all the little, insignificant changes with map updates.

 

I have a Nuvi52 that I use in the truck and it's pretty accurate. On occasion it will show me arriving at my destination 1/4 mile or so before I actually arrive there and once it showed my destination on the left when it was actually on the right, but that is about it. I don't trust it implicitly because it will occasionally try to send me through a no truck area, but it does have a handy detour function that will give you alternative routes.

I use it mostly to get me close, and then if i have doubts I call the receiver for specific directions.