I started in October 2017 along with joining slimming world and since then I have lost almost 2 stone (28lbs). At the start my appetite was cut drastically and I barely finished a meal. I have become used to the device now and while my appetite is back I don't think I am as hungry as before Modius. I haven't noticed a change in my sleep unfortunately but I continue to use my device daily and will do for the foreseeable future.