Hi
I am norwegian so I guess I will answer.
I know that both BI and CBS have a good reputation when it comes to MBA`s.
For BI in Norway I can tell that it is a good degree, they are working close to business all the time and are a private school. We do also have NHH who is competing with this school (
www.nhh.no), and should also be considered. They have a very good network for the students after they have finished their degree. And they get accepted to any job here.
When it comes to your decision, the CBS have a bright focus on international business.
Norway is of course very expensive living, that goes especially if you like to party.. In main you can say, what is not good for you, are expensive ;-) Alcohol, cigarettes..