This is my second time using it. Today I was at a 9 on a 10 pain scale. I had all the symptoms: Sensitivity to light sound and movement, extremely nausea, sensitivity to smell, stiff neck, stabbing pain on the top of my head, and feeling like my head's in a vise. These are not all the symptoms but the major ones. Before turning on the mechanism I: put on comfortable clothes, laid flat, with feet slightly elevated, no lights are on, and I was comfortable as I could make myself being in that much pain. I usually have the mechanism on 11 but this time it was at all time high of 20. After the 45 minutes I feel substantially better. I still have all the symptoms but not as severe. I would rate my pain at a six now. I am very thankful getting this device. I have tried over 20 different procedures medications and meditations . I was a partial skeptic before trying it. But I was open to any help I could get. And thankful I tried it.