A disposal in a country kitchen does the same job as one in town, but what it drains into can be different, so both sides matter when it quits. The unit itself fails in the usual ways. Humming without spinning is usually a jam, fixable and common. Leaking underneath is often seals or housing, a judgment call. Silence usually points to the electrical side or the motor, and a worn out motor usually means a new unit. The country part is what the disposal connects to, because out here the drain side might run to a septic system, and that changes a few things worth knowing.
On septic, it comes down to load. Everything ground and sent down the line arrives at the tank, and heavy disposal use adds to what the tank processes. That's not a ban. Plenty of Fallbrook kitchens run disposals on septic without trouble, and it's a question of sizing and habits worth talking through, especially when replacing a unit anyway. The right unit, used the right way, can work well with a septic system, while heavy use without a plan can add strain to the tank.
Whatever your disposal is doing, the contractor can handle it. Jams get cleared properly with the right tool, and leaks get checked with care for the cabinet around them. When a new unit is needed, it's matched to how the kitchen is really used and to the property's septic or sewer setup, and it's installed with the connections done right. Everything gets explained plainly, and you make every decision in your own time.