Pros
Stable competent management team accessible to everyone, collaborative colleagues and robust pipeline. Millennium has a small to mid size entrepreneurial environment, but is backed by a larger very successful pharmaceutical company which is the best of both worlds. Management pays attention to employee feedback and takes action. Great work is recognized in a variety of ways. Millennium is an intense place to work because people are passionate about helping cancer patients. They also take time out to enjoy each and to give back to the community through many company sponsored events.
Cons
Millennium attracts some of the brightest people in the industry which when you bring all those people together into one company, it can be somewhat humbling for them (am I as good as I thought I was). It's an adjustment that some people struggle with. People who come from very hierachical organizations struggle sometimes because they have more freedom at Millennium in how they get their work done. If you like a lot of structure, Millennium may not be the best place for you to work. No doubt about it, people work VERY hard at Millennium, so burnout can be an issue. The company is very good about offering flexibility to its employees so they can try to manage the balance between work and home.