For most people, probate is unnecessary.
It causes unnecessary delays and expense that are not required if you plan ahead. The actual process varies from state to state and some are more complex that others. In Ohio, the hassle-factor depends on the size of the estate, whether or not an original will is available, whether the spouse elects against the will and whether any of the potential heirs will challenge the will.
If you own real estate in more than one state, you’ll probably have to initiate probate in each state.