Pros
The leadership of Anita Shapiro has really turned the organization from being one that just went with the flow, (when I first started when it was under different leadership), to one in which the is a focus on innovation and on responding to current events relevant to the legal community. For example, PLI responded to the travel ban by adding more programs for lawyers on habeas corpus and are doing the same with news of the DACA repeal. This active engagement with the legal community keeps PLI relevant and cutting edge as a legal education provider.
PLI's benefits are second to none and are the best benefits of any employer I have ever had. Not only do you get amazing health care coverage but also eye, dental and many other perks. The also have "Coffee Talks" for employees on subject like Elder Care and more. They are always looking for ways to give more value to their employees.
Cons
You will make a little less than at a private organization but the benefits more than cover any difference. There is a lot of change at the moment but this is due to moving forward.