This is a political advertisement, but the fact it points out is that in order to pay for Obama Care, the Federal Government has targeted cuts in Medicare Advantage plans.
This video is a news story about a lady that was denied coverage under Medicare Advantage.
Medicare Advantage plans can also terminate your doctor for any reason. This news story gives an example:
Or, as this recent news story goes, you can have a Medicare Advantage plan and lose 47 hospitals in your network! This was recent news in Florida. Thankfully, the contract negotiations came to a positive resolution, but not before frightening a lot of seniors who did not want to spend their retirement worrying about their Medicare insurance.