Pros
Sogeti is an excellent place to learn about the world of sales oriented consulting. If you have a strong desire to learn about the technologies that the marketplace is looking for then Sogeti is an excellent place to work.
Cons
Because of the strongly sales oriented nature of the company (it's all about making profit) there are situations that you as a consultant may become involved with that are difficult and rather sticky during your representation to a Sogeti client. Be wary of over committing yourself as the expectations will be set at the bar you set for yourself. It should also be noted that the initial negotiation and hiring process for Sogeti tends to be long and drawn out with many interviews (usually by phone). Make sure you negotiate the salary you expect at the beginning, pay increases are not tied promotions directly, only the upper limits are tied to your position.