advantages:broaden one's horizons
improve one's ability of independent character
exercise own english by living with foreigners
get knowledge of other country's culture
make friends with people from all other countries
disadvantages:cost a large amount of money
feel strong pressure from leaving away from home and too many assignments which are unfamiliar to you
maybe you will feel racial discrimination
the different weather and food will upset you
you cannot quickly adjust to the alien environment(especially at the very beginning)