I studied for 4 months in MBS (I did my Erasmus there) and I have nothing but good and kind words for this place.
Their methodology is much different than what I was used to in Barcelona: all the classes were practical, with little or none theory explained and everything explained through real-case scenarios or simulations. The fact that the teachers were, most of the times, business men and women that where working part-time as teachers, allowed students to learn current hot topics that were trending on some kinds of industry.
Some of the subjects have no exams and instead they have a final project (for example, International Business Project of HR Management) that has to be done in groups, allowing yourself to develop teambuilding and teamworking skills. Also, the fact that classes are quite small allow for a better teacher-student communication.
Other than that, the Erasmus Programme of this university is quite recognized worldwide, making students not just from Europe, but from the world, to go to study in MBS. The variety of cultures and people that you meet allow for a more, better open-minded way of thinking.
Something I would recommend: International Business Project class and HR Management. Also, German can be learned in different levels according to your skills.
Something that I did not like that much: the wifi was quite slow and it was hard to connect to sometimes. Hope they have improved it!