Some additional details and links:
$1 billion in Federal Tax Dollars and a One Star Rating on Yelp––Quite an Expose––Behind the Scenes at Covered California
http://healthpolicyandmarket.blogspot.com/2015/04/1-billion-in-federal-tax-dollars-and.html
In December I purchased a policy directly from one of the few carriers offering policies through Covered California. I selected that policy, because my primary physician’s medical group would only accept two policies offered through Covered California, both of them PPO’s. The customer “service” has been appalling. The enrollment people do not speak with the billing people, so that any change in enrollment that reduces the premium results in overbilling and ultimately wrongful termination threats. The prescription drug coverage is not as advertised. My primary care physician says their procedure coding is more often than not erroneous. This incompetent/malicious “service” is the natural result of a government sponsored monopoly, which is exactly what Obamacare is.