Pros
The benefits are very good (a healthcare company -- so health insurance is very affordable), and you'd have to find a government job to find something with more job security. People seem pretty understanding about anything and everything, so there isn't really much pressure. And you only have to do something moderately intelligent for you to be recognized as a genius.
Cons
Working for Kaiser is like working a government job. Everyone has job security (Kaiser rarely fires anyone) with lots and lots of very old dead wood. I suspect many people were promoted to positions of moderate authority (Directors and under) simply out of seniority, because they seem to have no appreciable skills or knowledge. It's also extremely slow-moving. Something can be a "high-priority" project, and no one will have time for a 30 minute conference call for 2 weeks -- and this is acceptable. Finally, no one can make a decision, as there appears to be an endless cloud of stakeholders, policies, regulations, and everything else that will make it impossible for anyone trying to accomplishing something to push forward. Also, the stated policy from senior management is that everyone is essentially the same in terms of performance. You have to save the world in order to be considered above average. How do you imagine your typical high-performer taking this message?