Wow! One word: Challenge. But a good one. It was a great experience, and I grew a lot as a person. Why challenging? Because you will have to adapt to another lifestyle, living with a family you do not know and far away from your friends and family. But that is exactly at the same time the beauty. Your host family will guide you and will make you feel at home, so no worries! It is almost guaranteed that you will grow! so dont doubt it and just go for it. to me it has been an experience i am happy i did not missed it.