DH and I both have Medicare and the United Healthcare (AARP) supplement. It costs us $42/month and is going to $33/month in January. We have never had a problem with them paying. My own PCP costs nothing, specialists are $35/visit, most tests (blood work, xrays, etc.) are covered at about 80%. I have a $160 outpatient surgery premium, a $75 emergency room visit and $180/day inpatient hospital fee for the first 7 days, then it's 100$. (I figure they will sure try to get me out of there in 7 days and I'm pretty okay with that).
We have re-upped every year for the last 5 years.