Bests & Worsts Reviews from Amazon

My wife has cluster headaches. You can look that up, but they are excruciating. Even worse than migraines for some (like my wife). According to most websites like mayo clinic's the number one remedy is oxygen. My wife took 5 inhilations off this stuff (one big one at first, then 4 shorter ones) and her pain was gone. The results were dramatic. She only has to take a few hits a couple of times a day to stay the pain. It beats wearing a towel over your eyes to keep light out. She couldn't even watch tv because of the sound and light. And just like that, she could. Our next step now is to see if insurance will pay for a professional kit. If not we'll stick with these. I guess the biggest point here is that there is no doubt in our minds that there is 95% oxygen in the cans.