What benefits and disadvantages has membership in the EU brought to countries?

Benefits:

1. The single currency
2. Prestige. Belonging to the prestigious European community automatically raises the country in the class, significantly raise its status.
3. The protection and guarantee of democratic development, freedom of speech and human rights.
4. The European security of property rights.
5. Fight against corruption.
6. One of the most extensive and expensive markets for goods and services. The EU market includes 500 million people

Disadvantages:

1. EU is changes now and is not clear what will be the result.
2. More complex protection of producers because of lower import tariffs and simplifies the access of foreign goods and services to the Russian market.
3. Limited possibilities of the state to regulate foreign trade.