What's that?
I haven't seen a lot of commentary on SDN about Kaiser (or were you talking about other sites?). As far as HMO's go, So-Cal Kaiser is pretty much the best functioning one. I can speak much about No-Cal Kaiser, and they are different entities at this point, I believe.
You have job security. And if you do high risk OB, or another high risk field, Kaiser handles all of the ridiculous lawsuits. Kaiser has a policy to take all of its malpractice cases to suit, and your malpractice insurance isn't taken out of your paycheck. My mom basically couldn't even work outside of an entity such as an HMO b/c of the malpractice.
The downside is, of course, that you are only seeing insured patients, and you are stuck within the rigidity of an HMO, which can sometimes make referrals annoying. I've grown up within the system, however (w/ some horrible illnesses), and I've never had a bad time or terrible annoyance with the system. And in California, Kaiser and all other systems like it are required to take a certain # of Medicare/Medicaid patients, so you actually do get some underserved diversity. That's how Octopussy got her IVF babies delivered at a Kaiser facility. I can imagine that there's not a lot of room in Kaiser for OMM...so, in that regards, I can see that hardcore fans of manipulation may not embrace Kaiser, but I'm not even sure that's the case--it's just that every D.O. I've known who worked at Kaiser abandoned their OMM b/c they didn't think it was very worthwhile in the field of high risk OB (the only techniques the admit to using are adjusting the birthing posture to encourage the baby to come out during difficult births to avoid C-section...they feel they're better than the M.D.'s).