My experience with APRS is......... you can pretty much just make a cell phone call from the places you'll have digipeater coverage. It's fine for the local offroad parks like Big Bear, Anza Borrego, etc. If you're a gadgeteer and just want the gadget, go for it. But, if you plan on having people tracking you in more remote locales....I'd get a "SPOT", in the long run they are actually cheaper and more reliable.