Pros
The executive management genuinely cares about their employees. You don't feel like an employee but rather a stakeholder in the business. You will have a large amount of autonomy to make critical decisions even as an individual contributor which can be unnerving if you are used to having a manager hover over you. There is a well defined culture that is deep part of every day life at WWT. The company is young and you have lots of fun there. Best of all are the people. The engineers are the smartest you will ever meet and there is a great sense of camaraderie. Benefits are great. Salary is average for CSEs.
Cons
As the company grows so does the sense of disconnect from HQ. There is rampant nepotism in key positions. Though management will deny it, everyone knows that there is a strong undertow of "good ole' boys club" ingrained deep at WWT. You're either in or you're out. For those not in St. Louis this means that you're going to be career limited. There has been a lot of promotions from within, unfortunately many of those promoted have absolutely no experience which has caused low morale in many cases which is driving some of the brightest talent away. Management may or may not look favorably on your career growth so unless you are prepared to stay in your position until someone feels that they are "ready" to allow you to grow your career you may find yourself disillusioned. There is a culture of "no surprised" but we are surprised almost every day. Changes are made with almost no input from the troops in the field at closed door management meetings and edicts are passed down from on high to the regular employees with no understanding of how they affect anything. Finally, watch your back. There is a vibrant gossip mill in play. Its interesting to see those who are doing the least feeling confident in their jobs, while those who do the most, walking on eggshells - depending on your membership in the "club." Base salaries are not increased, only variable salary (very small yearly raises), and be VERY careful to go through your compensation package with a fine toothed comb.