Walkie talkies were a favorite toy when I was a kid, it is no small wonder I enjoy these long range, two-way radios.
I'm pretty fortunate to live in the middle of a national park. We do, however, have terrible cell service. These radios are useful if someone is going to walk the dogs, run down to the beach, or take the 1/2 mile walk to our mailbox while the other stays home. I've also found them super useful on group VW van and camping trips, allowing for easy group communication.
Range is pretty good on this model, but I haven't gotten 15-20 miles out of them, even on the open road. As always these radios work best in line-of-sight situations. If you have a large and dense piece of mountain or hill between you and the other party communication may be impossible. Around our forested park I get 2-4mi pretty easily, even with rolling hills and canyons.
Battery life is great. I've forgotten to charge these for months at a time, only to have them holding plenty of charge.
The channel and privacy settings are simple to use, and the radios are interoperable with other Motorola models, and other manufacturers FRS/GMRS radios. I suggest making sure everyone can send and received before having a large party of vehicles take off on a trip. Checking every morning is helpful, as dead batteries can cause these devices to lose their settings.
Much cooler than the walkie talkies I had as a kid.
Motorola MH230R 23-Mile Range 22-Channel FRS/GMRS Two-Way Radio (Pair) via Amazon