I've never been around a medical airplane but I did spend some time around the Air Life helicopter when I was in EMT school at Mercy. They can fit an amazing amount of life saving equipment and other medical equipment in a helicopter for a quick patient transport to a trauma center.
I've also never flown in a plane but if I had a severe illness, I'd probably want treatment at the Mayo Clinic in Minnesota and an air ambulance service would be way better than a trip in a bumpy old wheeled ambulance. It would be much quicker and probably a lot more comfortable. I didn't know until I read that site that they even have air ambulance service in Iowa. I'd have never guessed that.