I have used a Humana Advantage plan since I turned 65. It's been FANTASTIC. I had sepsis 5 years ago and spent a week on life support with a zillion doctors treating me. My out of pocket costs - ZERO.
Medicare Advantage Plans vary by state. The state I am now in has a zero co-pay for PCP, $20 for specialists, $75 for ER, $5 for PT. There are two medical schools in my city (New Orleans) so there are many, many great doctors that are local. My premium for the supplement is ZERO. I get a $20 a month credit to spend on OTC health goods (vitamins, toothpaste, dental floss, OTC pain relief). Dental and vision are included. I also could get transportation (taxi) for several visits per year if I needed it.
I have many health issues (I am old) but my out of pocket expenses for excellent care (copays and premiums) are less than $150 a year.
But if you live in an area where the in network doctors for an Advantage plan are scarce - then it's probably not for you.