. . .25% of the US is NOT covered by cell service, so there are many places without internet or limited to 1 provider, which is probably not the one you have. Satellite internet is the only way to insure yourself of service, where ever you go. That is why we have both, an aircard and a Motosat system.
I'm with you. I look at sat service as Plan B -- it's pretty much always there. Besides visiting out-of-the-way places in the US, I plan on going to Baja and Canada where I'm not expecting cell data service very often.
I only have 3G cell now and have looked at using other sat providers like Inmarsat using a rented sat terminals instead of a permanent Motosat dish.
However, the Inmarsat data rates are outrageous, so after a couple of rentals, you just priced yourself into a Motosat system.