TRUCKERS GPS

So, Just out of curiosity, how many of you guys and gals use these? Obviously there's nothing better than sitting down with an atlas and actually planning out a route, but maybe this comes close? Anyone actually have any experience with them? Good or bad.

What kind of features do they offer that are different than a GPS you might use for a car, or one I might use on my smartphone? I'm all in the business of making my life easier out there on the road. Working smarter, not harder. On the surface, these seem like they could be a lifesaver, but then again, I take everything with a grain of salt.

Any opinions/experience y'all can throw out there?

I like the Rand McNally's features. I can find truck stops on my route. It alerts me when there is a weigh station in X miles, alerts me when I am coming to a state border in X miles, alerts me to up/down grades in X miles.

It just makes things easier. It is also quite accurate in regards to my driving time.

I still drive with my eyes open though, can't find a GPS that will drive for me! lol.