Pros
Castlight has one of the most important company missions, in my opinion, in the US today and the people who have come to work here fall in step with working towards that mission every day. It's a job, so there is going to be stress and responsibilities and deadlines, but I am excited when I wake up every morning to come into work and be in the same room with brilliant minds who are attempting the impossible: to lift the veil currently shrouding the healthcare industry in the US. All of my co-workers are encouraging and challenging in a way that makes you want to work harder and better each day.
Cons
Because our mission is so vast and there is a strong desire for it in the current market, the employees do get overwhelmed. This is definitely not the place for you if you're looking for a job where you get to slack off and check out early - everyone is hard working and expectations are high.