Pros
Simon-Kucher has a great work culture, with awesome partners and directors, free snacks in the offices, and a reasonable travel and work schedule. Expect to travel only once or twice a month (on average). Furthermore, many of the directors and partners have families, and are comfortable with consultants balancing family requirements with work schedules. Finally, the company has a great review policy, and is is fair when providing promotions. Oh yeah - we also have an AMAZING holiday party IN GERMANY.
Cons
The major downside to Simon-Kucher is the relatively limited scope of the consultancy. Most projects will center around pricing, although there are many sales and marketing strategy projects as well. Fortunately, pricing is a much broader field than many people expect. the only other con is the pay, which is a bit lower than many competing consultancies.