Pros
They are moving very fast, but management is super organized to get all the essential behind-the-scenes work done. As with a lot of high-growth companies, everyone has to wear several hats. There is an incredible breadth of new and cutting-edge technologies used in creative ways, which makes a ton of opportunities to learn new things and grow. Fantastic new office with a lot of comforts provided. Huge investment into the company's growth and employees.
Cons
They are growing very fast, which tends to come with few growing pains and some discontent due to resistence to change. This growth also comes with great opportunities for those with ambition and willingness to take on responsibility. I found that some of the employees were very inexperienced. So much so, they did not seem to fully grasp how a business operates, what management actually means and is there for, or what proper business/office conduct was.