The two-minute fix you can try first
Before you call: check the red reset button on the bottom of the disposal. Disposals trip their own overload when they jam, and pressing the reset clears it. If the unit then hums but won't spin, use the hex wrench that came with the disposal (or any 1/4" Allen key) in the bottom center port to manually rotate the impeller. If it frees up, run cold water and try the switch again. If none of that works, that's where we come in.
When we replace, what we install
We stock InSinkErator Evolution and Badger series and Waste King L-Series units on the truck. For most Bridgeport homes a 3/4 HP unit is the right balance of power and noise. For households doing a lot of cooking, the 1 HP upgrade is worth it. We hook up the dishwasher inlet, install a new mounting assembly if needed, and test under load before we leave.