Hawkeye1,
I recently purchased the Midland 18-mile radios, the GTX-650. To make a long story short, they are going back to Cabela's. I purchsed them to use here in the mountains where I live. My dad's farm is about 1 mile by road and less than that by the way the crow flys. They won't work in the woods that far. I am disappointed with them. I thought since they are 5 watts and rated for 18 miles, that surely I could get a few miles out of them. Perhaps on flat, treeless terrain, but not in the mountains with trees.
I have had Motorola 2-mile radios for several years, and they will talk every bit as far as the 18-mile Midlands - at least where I have tested them, they do. My son and I gave both radios a test recently as I drove from home, going the same route. Both radios performed the same. After getting to the farm, I stepped out of the vehicle and could not reach him with either. I lost signal at the same place with both radios.
Hope this helps.