An election of President occurs every four years, before the general election, candidates go trough a series os state primaries and caucuses, people can vote for a candidate of any politicial party, each select a nominee to unite behind, the nominees anuncies a vice president candidate, the campaign across the country, Presidential debates take pace wich expose their ideas, at the election Day the electors cast their votes, the Congress counts the electoral votes and the Inauguration day finally take place.
The main Advantages are: the ability to know the candidates, to see the candidates in many situations, candidates have time to recover a bad situation, people don't need to rush into a choice.
The main Desadvantages are: Candidates for no chance stay in, hurts primary candidates on both sides, American people stop paying attention .