For years, I have been suffering from a form of Delayed Phase sleep disorder and instead of taking me around half an hour to fall asleep it generally takes me an hour and more to fall asleep. Albeit its high price, I have ordered a Zeez pebble and frankly was cynical about if this going to make a difference in my life and how safe is it to use but knowing how important the role of sleep is in allowing our bodies to heal, recover and regenerate for the coming day, I opted for it anyway . And Oh Boy I am glad I forked that money and purchased it!! and I did not take me weeks to see its effects!! in my case, It took 3-5 days and I noticed a quick reduction in time it took me to fall asleep. It still takes me more than half an hour but the improvement is awesome and I decided to buy two more one for my mother and one for my wife. I very much appreciate the dozens of minutes that are now converted to recovering sleep. I highly recommend Zeez to anyone that takes him more than half an hour to fall asleep and the EMF emitted is far less than a mobile phone. It is completely safe and very easy to use. Go for it.