Pros

They allow you to participate in a multitude of areas verses restricting you to what your background supports. They expect a lot from their employees, but offer competitive compensation and "best in class" benefits.

Cons

Fast paced growth sometimes makes it harder to perfect your work product. Career ladder climbers will not do well here as the organization runs lean, which translates to a flat organizational chart and title advancement. Again, they make up for this with opportunities that give you a deeper knowledge base for your career.