They don't want creativity, improvements or change, just for you to carry bricks.
Pros
Growing company with first mover advantage in a market that is set to absolutely dominate business in the next 10 yrs. The compensation package I had was very good, if a little unpredictable due to fluctuations in stock prices and an extremely large error in tax deductions, which they treated as trivial.
Cons
No job opportunities (senior posts are predominantly filled from external hiring - internal promotion is strongly discouraged), no openness to improvements, change or creativity with a strong culture of protecting the status-quo, "sacred cow syndrome" everywhere - from the very top down. Management know these are both serious issues, and have been for some time, but choose to not act. The "just do as you're told" attitude to relative senior staff is not a good way to engender loyalty and commitment. That's how you treat children.