Pros
Incredibly talented employees and overall company. Great alignment of departments, goals, and an intense focus. One of the best places that I've ever worked. Fun, Fast, Interesting, Leading Edge, great customers, and great team of people really making a huge difference. Awesome products and technology.
Cons
Alas, not all startups can maintain the spirit, environment and culture after an acquisition by a gigantic corporation that is a billion times the size. (OK, more than that.) The HR manager had some passive aggressive issues.