They're a legit company, rated B++ (I wouldn't buy from them based on that rating), HOWEVER, why would you buy a health insurance policy that only covers ONE illness? Your chances of using it JUST aren't that high.
If you want HEALTH insruance coverage, buy a health insurance policy. It's not cost effective, and very silly, to buy one policy for cancer, one for diabetes, one for heart problems, etc.
agent, 21+ years