I'm just like you, insulin and c-pap. I wear mine for snoring/sleep apnea. Since I've started using it I sleep 100% more restfully and no longer wake up with splitting headaches. My husband is sleeping much better, too!
It also brought my blood pressure down to safe levels so I was able to give up one BP med. When I realized how much my mood had improved from better sleep and my dear hubby's mood had improved because HE was getting better sleep it was a no brainer. My c-pap is my friend so wearing it became almost an instant habit. And there is one added bonus... When I get a cold it seems to keep my nose
open to breathing better, almost like it's able to resist a stuffy nose. Oh, and one more thing!!! When I've fixed baked beans for dinner I can put a scented candle (unlit) next to my air intake and DH's toots don't bother me at all.