I ordered a device three years ago to treat chronic insomnia and it's been great for me. I was addicted to sleeping medication and am now drug free. I use the device four or five times a week. My sleep is much improved and I'm dreaming again, which I find restorative. This is a terrific product and I'd recommend it highly to anyone suffering from the symptoms the device treats. The company staff is very helpful as well if you have questions.