Funny how nobody says that the euro should never have been established in the first place.
Personally, I liked the idea of each country having its own currency. The only problem was when you travelled from coubtrg to contry - you had to convert currencies, and you always lost money in the deal.
While having a single currency may have helped trade, I think some of the economies have suffered. Greece being the prime example.
I am hoping that Greece leaves the Euro. There might be some short term pain, but in the long term they will be better off for it.