Concerning medical evacuation, I provided the following comments on a related thread recently:
Here are some questions to ask when shopping for medical evacuation coverage within a comprehensive trip insurance policy: 1) Does the policy cover pre-existing medical conditions, 2) Does the coverage get you home, not just to the nearest facility that is certified for treatment of your condition, 3) Is there a possibility that your illness/injury may require the use of a private air ambulance. Minimal evacuation coverage limits may get you home on a scheduled flight with a commercial airline but very possibly would not in an air ambulance with critical care capabilities. This could easily cost hundreds of thousands of dollars especially if you are far from home or are in a remote location.
I have used squaremouth.com several times and like it a lot.