We're on Kaiser and my wife has an autoimmune disorder, alongside a number of other chronic issues.
Really need more details about the plans. We pay out the ass for the highest tier Kaiser "Green Point of Service" plan that allows us to see docs, hospitals and pharmacies outside of the kaiser system.
Some of our Kaiser specialists are great, but in general it seems something of a place where primary care docs go for experience before establishing their own private practices.
The system's overall efficiency is a beautiful thing as far as appointment punctuality, labs, test results and doctor-patient communications are concerned, but a terrible curse in having to deal with so many damn gatekeepers, receiving non-emergency urgent care, flexibility, etc...
I'd say if you're comfortable with the specialists she needs to see within the Kaiser system (rheumatologist, infectious disease, etc.), and the costs are commensurate with the other plan, then they're a fairly safe bet. They generally won't fuck you over with billing surprises and whatnot. PPOs are always nice for flexibility, but I've never dealt with Health Net, so I dunno how they are in that regard.