Pros
It's a very good place to learn the basis of a professional environment. Possibility of working 1 day a week during school, and full time during the summer.
Cons
As a student, you help the people who are overloaded by helping them do their most basic work. Can be a little bit boring at times. Even though it's a student job, I like to learn new stuff, so I have to dig mostly by myself and learn stuff by myself.
Also, you have next to no chance of working as a student in Dessau is you don't have a contact who works there, and the higher the better.