I am delighted to report that my quality of sleep has improved dramatically since using the Zeez. I was diagnosed with Rheumatoid Arthritis about 18 years ago and one of the main symptoms is fatigue. I therefore thought that feeling tired all the time was part of my condition and something I had to put up with. I could easily sleep for 10 or 11 hours or sometimes more but would still wake up tired. It could take me a good couple of hours to get going in what was left of the morning. Then I heard about the Zeez and thought it was worth seeing whether it would improve the quality of my sleep and therefore reduce the number of hours I was sleeping. Since using the Zeez, not only do I find it easier to wake up and get going in the mornings but I am now sleeping an average of 8 or 9 hours which is a significant improvement. My energy levels during the day are also improved. I can not recommend this device too highly.