Pros
Each hospital is pretty well independent from the others in the system. That means that the majority of your culture probably won't change when your hospital is purchased. Also, management level positions seem to have relative autonomy from the Corporate office in California. You don't really have a budget to work from, just a general guideline that tasks need to be accomplished for as little money as possible. I have maintained a relatively decent work/life balance, despite two go-lives and numerous other projects. Compensation is a bit on the low side of competitive, provided that you have the correct job title, but it is not the worst I've been aware of.
Cons
There is no lack of ambition in this organization. They set out to achieve a goal and they do so, as close to their set deadline as possible... REGARDLESS of the level of preparedness of the staff. Communication is a nightmare. If you do manage to get in touch with your "support" person at the Corporate level, there is no guarantee that they will give you a straight answer. I've been working for this group for about one year and will say that, no matter how many promises you hear that they will provide you with "all the support you will need," do NOT believe a word of it. Your "support" will come in the form of a position with high turnover, since they tend to put the newest hire on projects for which they likely don't have all of the details. Most of their hires are foreign medical graduates, which is NOT a bad thing. But, it can hinder communication, due to some accents which are a bit difficult to understand. You will likely be assigned a multitude of new tasks when Prime takes over, because others in your department were let go, but there isn't much hope that you'll get any kind of increase to your take home pay or a title which will look better on a resume. Specifically, I am currently the Manager in my department and I was next in line to be the Director. I have been performing the tasks of both the Director and the Manager for approximately one year with minimal support from the Corporate office and have had some measure of success. I was promised several times that I would be moved into the position, I recently learned, however, that my CFO and several other individuals at the Corporate office determined that I should stay where I am and they were now looking outside the organization to fill the Director position. I have heard RUMORS ( I stress this heavily, since the "grapevine" is reliable to a point...) that the CEO of Prime has walked into meetings with Directors at other facilities and, when he disapproved of the answers given by the Director, he fired them on the spot. That story came directly from my "support" person at Corporate who has been through several transitions with Prime. I also heard directly from one of my colleagues at my hospital that she corrected the CEO (Dr. Prem Reddy) on a call regarding the specifics of some coding or financial data and he snapped at her "don't ever correct me" (or something to that effect) in the middle of a meeting... with other leaders. Extremely unprofessional, in my opinion. I get the impression (from anecdotes, as above, and from first-hand experience) that this company is run by folks who want things their way, immediately, and if you aren't willing to play ball, they will simply blow up the entire process and start from scratch, ignoring the input of local mid-level leadership.