Pros
The work environment is stimulating, with young colleagues and many different professions who work together on multiple projects. A plus point is definitely the young and informal climate, perfect for starting a working career.
Cons
There is a tendency to give too much importance to "American" style initiatives (workshops, kickoffs, continuous parties ... often outside working hours) that employees don't like so much. Shy people can find it hard to integrate themselves into this "party-like" climate where they are often noticed more for their ability to be among others at the center of attention than for actual work skills. Moreover, these initiatives entail costs, which could be reduced, especially in times of crisis rather than dismiss employees. The salary is low compared to the average.