How does the single euro payment area (SEPA) work? In what ways is SEPA good for businesses? In what ways might it be good for individual people and families?

What kinds of trouble might SEPA cause? For instance, do you see some nations really loving the Euro and others really hating it? Why might they feel so differently about the Euro?Use a current example for illustration.

Why might a country like Greece want to go back to its own currency rather than the Euro? Give an example.Would that be the same reasoning or different for why the UK might want to focus on the British Pound rather than the Euro?